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<pre><span class="sourceLineNo">001</span>package com.github.sarxos.webcam;<a name="line.1"></a>
<span class="sourceLineNo">002</span><a name="line.2"></a>
<span class="sourceLineNo">003</span>import java.awt.Dimension;<a name="line.3"></a>
<span class="sourceLineNo">004</span>import java.awt.image.BufferedImage;<a name="line.4"></a>
<span class="sourceLineNo">005</span>import java.nio.ByteBuffer;<a name="line.5"></a>
<span class="sourceLineNo">006</span>import java.util.ArrayList;<a name="line.6"></a>
<span class="sourceLineNo">007</span>import java.util.Arrays;<a name="line.7"></a>
<span class="sourceLineNo">008</span>import java.util.Collections;<a name="line.8"></a>
<span class="sourceLineNo">009</span>import java.util.Iterator;<a name="line.9"></a>
<span class="sourceLineNo">010</span>import java.util.List;<a name="line.10"></a>
<span class="sourceLineNo">011</span>import java.util.concurrent.CopyOnWriteArrayList;<a name="line.11"></a>
<span class="sourceLineNo">012</span>import java.util.concurrent.ExecutorService;<a name="line.12"></a>
<span class="sourceLineNo">013</span>import java.util.concurrent.Executors;<a name="line.13"></a>
<span class="sourceLineNo">014</span>import java.util.concurrent.ThreadFactory;<a name="line.14"></a>
<span class="sourceLineNo">015</span>import java.util.concurrent.TimeUnit;<a name="line.15"></a>
<span class="sourceLineNo">016</span>import java.util.concurrent.TimeoutException;<a name="line.16"></a>
<span class="sourceLineNo">017</span>import java.util.concurrent.atomic.AtomicBoolean;<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>import org.slf4j.Logger;<a name="line.19"></a>
<span class="sourceLineNo">020</span>import org.slf4j.LoggerFactory;<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>import com.github.sarxos.webcam.WebcamDevice.BufferAccess;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import com.github.sarxos.webcam.ds.buildin.WebcamDefaultDevice;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import com.github.sarxos.webcam.ds.buildin.WebcamDefaultDriver;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import com.github.sarxos.webcam.ds.cgt.WebcamCloseTask;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import com.github.sarxos.webcam.ds.cgt.WebcamDisposeTask;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import com.github.sarxos.webcam.ds.cgt.WebcamGetBufferTask;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import com.github.sarxos.webcam.ds.cgt.WebcamGetImageTask;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import com.github.sarxos.webcam.ds.cgt.WebcamOpenTask;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import com.github.sarxos.webcam.ds.cgt.WebcamReadBufferTask;<a name="line.30"></a>
<span class="sourceLineNo">031</span><a name="line.31"></a>
<span class="sourceLineNo">032</span><a name="line.32"></a>
<span class="sourceLineNo">033</span>/**<a name="line.33"></a>
<span class="sourceLineNo">034</span> * Webcam class. It wraps webcam device obtained from webcam driver.<a name="line.34"></a>
<span class="sourceLineNo">035</span> *<a name="line.35"></a>
<span class="sourceLineNo">036</span> * @author Bartosz Firyn (bfiryn)<a name="line.36"></a>
<span class="sourceLineNo">037</span> */<a name="line.37"></a>
<span class="sourceLineNo">038</span>public class Webcam {<a name="line.38"></a>
<span class="sourceLineNo">039</span><a name="line.39"></a>
<span class="sourceLineNo">040</span>        /**<a name="line.40"></a>
<span class="sourceLineNo">041</span>         * Class used to asynchronously notify all webcam listeners about new image available.<a name="line.41"></a>
<span class="sourceLineNo">042</span>         *<a name="line.42"></a>
<span class="sourceLineNo">043</span>         * @author Bartosz Firyn (sarxos)<a name="line.43"></a>
<span class="sourceLineNo">044</span>         */<a name="line.44"></a>
<span class="sourceLineNo">045</span>        private static final class ImageNotification implements Runnable {<a name="line.45"></a>
<span class="sourceLineNo">046</span><a name="line.46"></a>
<span class="sourceLineNo">047</span>                /**<a name="line.47"></a>
<span class="sourceLineNo">048</span>                 * Camera.<a name="line.48"></a>
<span class="sourceLineNo">049</span>                 */<a name="line.49"></a>
<span class="sourceLineNo">050</span>                private final Webcam webcam;<a name="line.50"></a>
<span class="sourceLineNo">051</span><a name="line.51"></a>
<span class="sourceLineNo">052</span>                /**<a name="line.52"></a>
<span class="sourceLineNo">053</span>                 * Acquired image.<a name="line.53"></a>
<span class="sourceLineNo">054</span>                 */<a name="line.54"></a>
<span class="sourceLineNo">055</span>                private final BufferedImage image;<a name="line.55"></a>
<span class="sourceLineNo">056</span><a name="line.56"></a>
<span class="sourceLineNo">057</span>                /**<a name="line.57"></a>
<span class="sourceLineNo">058</span>                 * Create new notification.<a name="line.58"></a>
<span class="sourceLineNo">059</span>                 *<a name="line.59"></a>
<span class="sourceLineNo">060</span>                 * @param webcam the webcam from which image has been acquired<a name="line.60"></a>
<span class="sourceLineNo">061</span>                 * @param image the acquired image<a name="line.61"></a>
<span class="sourceLineNo">062</span>                 */<a name="line.62"></a>
<span class="sourceLineNo">063</span>                public ImageNotification(Webcam webcam, BufferedImage image) {<a name="line.63"></a>
<span class="sourceLineNo">064</span>                        this.webcam = webcam;<a name="line.64"></a>
<span class="sourceLineNo">065</span>                        this.image = image;<a name="line.65"></a>
<span class="sourceLineNo">066</span>                }<a name="line.66"></a>
<span class="sourceLineNo">067</span><a name="line.67"></a>
<span class="sourceLineNo">068</span>                @Override<a name="line.68"></a>
<span class="sourceLineNo">069</span>                public void run() {<a name="line.69"></a>
<span class="sourceLineNo">070</span>                        if (image != null) {<a name="line.70"></a>
<span class="sourceLineNo">071</span>                                WebcamEvent we = new WebcamEvent(WebcamEventType.NEW_IMAGE, webcam, image);<a name="line.71"></a>
<span class="sourceLineNo">072</span>                                for (WebcamListener l : webcam.getWebcamListeners()) {<a name="line.72"></a>
<span class="sourceLineNo">073</span>                                        try {<a name="line.73"></a>
<span class="sourceLineNo">074</span>                                                l.webcamImageObtained(we);<a name="line.74"></a>
<span class="sourceLineNo">075</span>                                        } catch (Exception e) {<a name="line.75"></a>
<span class="sourceLineNo">076</span>                                                LOG.error(String.format("Notify image acquired, exception when calling listener %s", l.getClass()), e);<a name="line.76"></a>
<span class="sourceLineNo">077</span>                                        }<a name="line.77"></a>
<span class="sourceLineNo">078</span>                                }<a name="line.78"></a>
<span class="sourceLineNo">079</span>                        }<a name="line.79"></a>
<span class="sourceLineNo">080</span>                }<a name="line.80"></a>
<span class="sourceLineNo">081</span>        }<a name="line.81"></a>
<span class="sourceLineNo">082</span><a name="line.82"></a>
<span class="sourceLineNo">083</span>        private final class NotificationThreadFactory implements ThreadFactory {<a name="line.83"></a>
<span class="sourceLineNo">084</span><a name="line.84"></a>
<span class="sourceLineNo">085</span>                @Override<a name="line.85"></a>
<span class="sourceLineNo">086</span>                public Thread newThread(Runnable r) {<a name="line.86"></a>
<span class="sourceLineNo">087</span>                        Thread t = new Thread(r, String.format("notificator-[%s]", getName()));<a name="line.87"></a>
<span class="sourceLineNo">088</span>                        t.setUncaughtExceptionHandler(WebcamExceptionHandler.getInstance());<a name="line.88"></a>
<span class="sourceLineNo">089</span>                        t.setDaemon(true);<a name="line.89"></a>
<span class="sourceLineNo">090</span>                        return t;<a name="line.90"></a>
<span class="sourceLineNo">091</span>                }<a name="line.91"></a>
<span class="sourceLineNo">092</span>        }<a name="line.92"></a>
<span class="sourceLineNo">093</span><a name="line.93"></a>
<span class="sourceLineNo">094</span>        /**<a name="line.94"></a>
<span class="sourceLineNo">095</span>         * Logger instance.<a name="line.95"></a>
<span class="sourceLineNo">096</span>         */<a name="line.96"></a>
<span class="sourceLineNo">097</span>        private static final Logger LOG = LoggerFactory.getLogger(Webcam.class);<a name="line.97"></a>
<span class="sourceLineNo">098</span><a name="line.98"></a>
<span class="sourceLineNo">099</span>        /**<a name="line.99"></a>
<span class="sourceLineNo">100</span>         * List of driver classes names to search for.<a name="line.100"></a>
<span class="sourceLineNo">101</span>         */<a name="line.101"></a>
<span class="sourceLineNo">102</span>        private static final List&lt;String&gt; DRIVERS_LIST = new ArrayList&lt;String&gt;();<a name="line.102"></a>
<span class="sourceLineNo">103</span><a name="line.103"></a>
<span class="sourceLineNo">104</span>        /**<a name="line.104"></a>
<span class="sourceLineNo">105</span>         * List of driver classes to search for.<a name="line.105"></a>
<span class="sourceLineNo">106</span>         */<a name="line.106"></a>
<span class="sourceLineNo">107</span>        private static final List&lt;Class&lt;?&gt;&gt; DRIVERS_CLASS_LIST = new ArrayList&lt;Class&lt;?&gt;&gt;();<a name="line.107"></a>
<span class="sourceLineNo">108</span><a name="line.108"></a>
<span class="sourceLineNo">109</span>        /**<a name="line.109"></a>
<span class="sourceLineNo">110</span>         * Discovery listeners.<a name="line.110"></a>
<span class="sourceLineNo">111</span>         */<a name="line.111"></a>
<span class="sourceLineNo">112</span>        private static final List&lt;WebcamDiscoveryListener&gt; DISCOVERY_LISTENERS = Collections.synchronizedList(new ArrayList&lt;WebcamDiscoveryListener&gt;());<a name="line.112"></a>
<span class="sourceLineNo">113</span><a name="line.113"></a>
<span class="sourceLineNo">114</span>        /**<a name="line.114"></a>
<span class="sourceLineNo">115</span>         * Webcam driver (LtiCivil, JMF, FMJ, JQT, OpenCV, VLCj, etc).<a name="line.115"></a>
<span class="sourceLineNo">116</span>         */<a name="line.116"></a>
<span class="sourceLineNo">117</span>        private static volatile WebcamDriver driver = null;<a name="line.117"></a>
<span class="sourceLineNo">118</span><a name="line.118"></a>
<span class="sourceLineNo">119</span>        /**<a name="line.119"></a>
<span class="sourceLineNo">120</span>         * Webcam discovery service.<a name="line.120"></a>
<span class="sourceLineNo">121</span>         */<a name="line.121"></a>
<span class="sourceLineNo">122</span>        private static volatile WebcamDiscoveryService discovery = null;<a name="line.122"></a>
<span class="sourceLineNo">123</span><a name="line.123"></a>
<span class="sourceLineNo">124</span>        /**<a name="line.124"></a>
<span class="sourceLineNo">125</span>         * Is automated deallocation on TERM signal enabled.<a name="line.125"></a>
<span class="sourceLineNo">126</span>         */<a name="line.126"></a>
<span class="sourceLineNo">127</span>        private static boolean deallocOnTermSignal = false;<a name="line.127"></a>
<span class="sourceLineNo">128</span><a name="line.128"></a>
<span class="sourceLineNo">129</span>        /**<a name="line.129"></a>
<span class="sourceLineNo">130</span>         * Is auto-open feature enabled?<a name="line.130"></a>
<span class="sourceLineNo">131</span>         */<a name="line.131"></a>
<span class="sourceLineNo">132</span>        private static boolean autoOpen = false;<a name="line.132"></a>
<span class="sourceLineNo">133</span><a name="line.133"></a>
<span class="sourceLineNo">134</span>        /**<a name="line.134"></a>
<span class="sourceLineNo">135</span>         * Webcam listeners.<a name="line.135"></a>
<span class="sourceLineNo">136</span>         */<a name="line.136"></a>
<span class="sourceLineNo">137</span>        private List&lt;WebcamListener&gt; listeners = new CopyOnWriteArrayList&lt;WebcamListener&gt;();<a name="line.137"></a>
<span class="sourceLineNo">138</span><a name="line.138"></a>
<span class="sourceLineNo">139</span>        /**<a name="line.139"></a>
<span class="sourceLineNo">140</span>         * List of custom resolution sizes supported by webcam instance.<a name="line.140"></a>
<span class="sourceLineNo">141</span>         */<a name="line.141"></a>
<span class="sourceLineNo">142</span>        private List&lt;Dimension&gt; customSizes = new ArrayList&lt;Dimension&gt;();<a name="line.142"></a>
<span class="sourceLineNo">143</span><a name="line.143"></a>
<span class="sourceLineNo">144</span>        /**<a name="line.144"></a>
<span class="sourceLineNo">145</span>         * Shutdown hook.<a name="line.145"></a>
<span class="sourceLineNo">146</span>         */<a name="line.146"></a>
<span class="sourceLineNo">147</span>        private WebcamShutdownHook hook = null;<a name="line.147"></a>
<span class="sourceLineNo">148</span><a name="line.148"></a>
<span class="sourceLineNo">149</span>        /**<a name="line.149"></a>
<span class="sourceLineNo">150</span>         * Underlying webcam device.<a name="line.150"></a>
<span class="sourceLineNo">151</span>         */<a name="line.151"></a>
<span class="sourceLineNo">152</span>        private WebcamDevice device = null;<a name="line.152"></a>
<span class="sourceLineNo">153</span><a name="line.153"></a>
<span class="sourceLineNo">154</span>        /**<a name="line.154"></a>
<span class="sourceLineNo">155</span>         * Is webcam open?<a name="line.155"></a>
<span class="sourceLineNo">156</span>         */<a name="line.156"></a>
<span class="sourceLineNo">157</span>        private AtomicBoolean open = new AtomicBoolean(false);<a name="line.157"></a>
<span class="sourceLineNo">158</span><a name="line.158"></a>
<span class="sourceLineNo">159</span>        /**<a name="line.159"></a>
<span class="sourceLineNo">160</span>         * Is webcam already disposed?<a name="line.160"></a>
<span class="sourceLineNo">161</span>         */<a name="line.161"></a>
<span class="sourceLineNo">162</span>        private AtomicBoolean disposed = new AtomicBoolean(false);<a name="line.162"></a>
<span class="sourceLineNo">163</span><a name="line.163"></a>
<span class="sourceLineNo">164</span>        /**<a name="line.164"></a>
<span class="sourceLineNo">165</span>         * Is non-blocking (asynchronous) access enabled?<a name="line.165"></a>
<span class="sourceLineNo">166</span>         */<a name="line.166"></a>
<span class="sourceLineNo">167</span>        private volatile boolean asynchronous = false;<a name="line.167"></a>
<span class="sourceLineNo">168</span><a name="line.168"></a>
<span class="sourceLineNo">169</span>        /**<a name="line.169"></a>
<span class="sourceLineNo">170</span>         * Current FPS.<a name="line.170"></a>
<span class="sourceLineNo">171</span>         */<a name="line.171"></a>
<span class="sourceLineNo">172</span>        private volatile double fps = 0;<a name="line.172"></a>
<span class="sourceLineNo">173</span><a name="line.173"></a>
<span class="sourceLineNo">174</span>        /**<a name="line.174"></a>
<span class="sourceLineNo">175</span>         * Webcam image updater.<a name="line.175"></a>
<span class="sourceLineNo">176</span>         */<a name="line.176"></a>
<span class="sourceLineNo">177</span>        private volatile WebcamUpdater updater = null;<a name="line.177"></a>
<span class="sourceLineNo">178</span><a name="line.178"></a>
<span class="sourceLineNo">179</span>        /**<a name="line.179"></a>
<span class="sourceLineNo">180</span>         * Image transformer.<a name="line.180"></a>
<span class="sourceLineNo">181</span>         */<a name="line.181"></a>
<span class="sourceLineNo">182</span>        private volatile WebcamImageTransformer transformer = null;<a name="line.182"></a>
<span class="sourceLineNo">183</span><a name="line.183"></a>
<span class="sourceLineNo">184</span>        /**<a name="line.184"></a>
<span class="sourceLineNo">185</span>         * Lock which denies access to the given webcam when it's already in use by other webcam capture<a name="line.185"></a>
<span class="sourceLineNo">186</span>         * API process or thread.<a name="line.186"></a>
<span class="sourceLineNo">187</span>         */<a name="line.187"></a>
<span class="sourceLineNo">188</span>        private WebcamLock lock = null;<a name="line.188"></a>
<span class="sourceLineNo">189</span><a name="line.189"></a>
<span class="sourceLineNo">190</span>        /**<a name="line.190"></a>
<span class="sourceLineNo">191</span>         * Executor service for image notifications.<a name="line.191"></a>
<span class="sourceLineNo">192</span>         */<a name="line.192"></a>
<span class="sourceLineNo">193</span>        private ExecutorService notificator = null;<a name="line.193"></a>
<span class="sourceLineNo">194</span><a name="line.194"></a>
<span class="sourceLineNo">195</span>        /**<a name="line.195"></a>
<span class="sourceLineNo">196</span>         * Webcam class.<a name="line.196"></a>
<span class="sourceLineNo">197</span>         *<a name="line.197"></a>
<span class="sourceLineNo">198</span>         * @param device - device to be used as webcam<a name="line.198"></a>
<span class="sourceLineNo">199</span>         * @throws IllegalArgumentException when device argument is null<a name="line.199"></a>
<span class="sourceLineNo">200</span>         */<a name="line.200"></a>
<span class="sourceLineNo">201</span>        protected Webcam(WebcamDevice device) {<a name="line.201"></a>
<span class="sourceLineNo">202</span>                if (device == null) {<a name="line.202"></a>
<span class="sourceLineNo">203</span>                        throw new IllegalArgumentException("Webcam device cannot be null");<a name="line.203"></a>
<span class="sourceLineNo">204</span>                }<a name="line.204"></a>
<span class="sourceLineNo">205</span>                this.device = device;<a name="line.205"></a>
<span class="sourceLineNo">206</span>                this.lock = new WebcamLock(this);<a name="line.206"></a>
<span class="sourceLineNo">207</span>        }<a name="line.207"></a>
<span class="sourceLineNo">208</span><a name="line.208"></a>
<span class="sourceLineNo">209</span>        /**<a name="line.209"></a>
<span class="sourceLineNo">210</span>         * Asynchronously start new thread which will notify all webcam listeners about the new image<a name="line.210"></a>
<span class="sourceLineNo">211</span>         * available.<a name="line.211"></a>
<span class="sourceLineNo">212</span>         */<a name="line.212"></a>
<span class="sourceLineNo">213</span>        protected void notifyWebcamImageAcquired(BufferedImage image) {<a name="line.213"></a>
<span class="sourceLineNo">214</span><a name="line.214"></a>
<span class="sourceLineNo">215</span>                // notify webcam listeners of new image available, do that only if there<a name="line.215"></a>
<span class="sourceLineNo">216</span>                // are any webcam listeners available because there is no sense to start<a name="line.216"></a>
<span class="sourceLineNo">217</span>                // additional threads for no purpose<a name="line.217"></a>
<span class="sourceLineNo">218</span><a name="line.218"></a>
<span class="sourceLineNo">219</span>                if (getWebcamListenersCount() &gt; 0) {<a name="line.219"></a>
<span class="sourceLineNo">220</span>                        notificator.execute(new ImageNotification(this, image));<a name="line.220"></a>
<span class="sourceLineNo">221</span>                }<a name="line.221"></a>
<span class="sourceLineNo">222</span>        }<a name="line.222"></a>
<span class="sourceLineNo">223</span><a name="line.223"></a>
<span class="sourceLineNo">224</span>        /**<a name="line.224"></a>
<span class="sourceLineNo">225</span>         * Open the webcam in blocking (synchronous) mode.<a name="line.225"></a>
<span class="sourceLineNo">226</span>         *<a name="line.226"></a>
<span class="sourceLineNo">227</span>         * @return True if webcam has been open, false otherwise<a name="line.227"></a>
<span class="sourceLineNo">228</span>         * @see #open(boolean)<a name="line.228"></a>
<span class="sourceLineNo">229</span>         * @throws WebcamException when something went wrong<a name="line.229"></a>
<span class="sourceLineNo">230</span>         */<a name="line.230"></a>
<span class="sourceLineNo">231</span>        public boolean open() {<a name="line.231"></a>
<span class="sourceLineNo">232</span>                return open(false);<a name="line.232"></a>
<span class="sourceLineNo">233</span>        }<a name="line.233"></a>
<span class="sourceLineNo">234</span><a name="line.234"></a>
<span class="sourceLineNo">235</span>        /**<a name="line.235"></a>
<span class="sourceLineNo">236</span>         * Open the webcam in either blocking (synchronous) or non-blocking (asynchronous) mode.The<a name="line.236"></a>
<span class="sourceLineNo">237</span>         * difference between those two modes lies in the image acquisition mechanism.&lt;br&gt;<a name="line.237"></a>
<span class="sourceLineNo">238</span>         * &lt;br&gt;<a name="line.238"></a>
<span class="sourceLineNo">239</span>         * In blocking mode, when user calls {@link #getImage()} method, device is being queried for new<a name="line.239"></a>
<span class="sourceLineNo">240</span>         * image buffer and user have to wait for it to be available.&lt;br&gt;<a name="line.240"></a>
<span class="sourceLineNo">241</span>         * &lt;br&gt;<a name="line.241"></a>
<span class="sourceLineNo">242</span>         * In non-blocking mode, there is a special thread running in the background which constantly<a name="line.242"></a>
<span class="sourceLineNo">243</span>         * fetch new images and cache them internally for further use. This cached instance is returned<a name="line.243"></a>
<span class="sourceLineNo">244</span>         * every time when user request new image. Because of that it can be used when timeing is very<a name="line.244"></a>
<span class="sourceLineNo">245</span>         * important, because all users calls for new image do not have to wait on device response. By<a name="line.245"></a>
<span class="sourceLineNo">246</span>         * using this mode user should be aware of the fact that in some cases, when two consecutive<a name="line.246"></a>
<span class="sourceLineNo">247</span>         * calls to get new image are executed more often than webcam device can serve them, the same<a name="line.247"></a>
<span class="sourceLineNo">248</span>         * image instance will be returned. User should use {@link #isImageNew()} method to distinguish<a name="line.248"></a>
<span class="sourceLineNo">249</span>         * if returned image is not the same as the previous one.<a name="line.249"></a>
<span class="sourceLineNo">250</span>         *<a name="line.250"></a>
<span class="sourceLineNo">251</span>         * @param async true for non-blocking mode, false for blocking<a name="line.251"></a>
<span class="sourceLineNo">252</span>         * @return True if webcam has been open<a name="line.252"></a>
<span class="sourceLineNo">253</span>         * @throws WebcamException when something went wrong<a name="line.253"></a>
<span class="sourceLineNo">254</span>         */<a name="line.254"></a>
<span class="sourceLineNo">255</span>        public boolean open(boolean async) {<a name="line.255"></a>
<span class="sourceLineNo">256</span><a name="line.256"></a>
<span class="sourceLineNo">257</span>                if (open.compareAndSet(false, true)) {<a name="line.257"></a>
<span class="sourceLineNo">258</span><a name="line.258"></a>
<span class="sourceLineNo">259</span>                        assert lock != null;<a name="line.259"></a>
<span class="sourceLineNo">260</span><a name="line.260"></a>
<span class="sourceLineNo">261</span>                        notificator = Executors.newSingleThreadExecutor(new NotificationThreadFactory());<a name="line.261"></a>
<span class="sourceLineNo">262</span><a name="line.262"></a>
<span class="sourceLineNo">263</span>                        // lock webcam for other Java (only) processes<a name="line.263"></a>
<span class="sourceLineNo">264</span><a name="line.264"></a>
<span class="sourceLineNo">265</span>                        lock.lock();<a name="line.265"></a>
<span class="sourceLineNo">266</span><a name="line.266"></a>
<span class="sourceLineNo">267</span>                        // open webcam device<a name="line.267"></a>
<span class="sourceLineNo">268</span><a name="line.268"></a>
<span class="sourceLineNo">269</span>                        WebcamOpenTask task = new WebcamOpenTask(driver, device);<a name="line.269"></a>
<span class="sourceLineNo">270</span>                        try {<a name="line.270"></a>
<span class="sourceLineNo">271</span>                                task.open();<a name="line.271"></a>
<span class="sourceLineNo">272</span>                        } catch (InterruptedException e) {<a name="line.272"></a>
<span class="sourceLineNo">273</span>                                lock.unlock();<a name="line.273"></a>
<span class="sourceLineNo">274</span>                                open.set(false);<a name="line.274"></a>
<span class="sourceLineNo">275</span>                                LOG.debug("Thread has been interrupted in the middle of webcam opening process!", e);<a name="line.275"></a>
<span class="sourceLineNo">276</span>                                return false;<a name="line.276"></a>
<span class="sourceLineNo">277</span>                        } catch (WebcamException e) {<a name="line.277"></a>
<span class="sourceLineNo">278</span>                                lock.unlock();<a name="line.278"></a>
<span class="sourceLineNo">279</span>                                open.set(false);<a name="line.279"></a>
<span class="sourceLineNo">280</span>                                LOG.debug("Webcam exception when opening", e);<a name="line.280"></a>
<span class="sourceLineNo">281</span>                                throw e;<a name="line.281"></a>
<span class="sourceLineNo">282</span>                        }<a name="line.282"></a>
<span class="sourceLineNo">283</span><a name="line.283"></a>
<span class="sourceLineNo">284</span>                        LOG.debug("Webcam is now open {}", getName());<a name="line.284"></a>
<span class="sourceLineNo">285</span><a name="line.285"></a>
<span class="sourceLineNo">286</span>                        // setup non-blocking configuration<a name="line.286"></a>
<span class="sourceLineNo">287</span><a name="line.287"></a>
<span class="sourceLineNo">288</span>                        if (asynchronous = async) {<a name="line.288"></a>
<span class="sourceLineNo">289</span>                                if (updater == null) {<a name="line.289"></a>
<span class="sourceLineNo">290</span>                                        updater = new WebcamUpdater(this);<a name="line.290"></a>
<span class="sourceLineNo">291</span>                                }<a name="line.291"></a>
<span class="sourceLineNo">292</span>                                updater.start();<a name="line.292"></a>
<span class="sourceLineNo">293</span>                        }<a name="line.293"></a>
<span class="sourceLineNo">294</span><a name="line.294"></a>
<span class="sourceLineNo">295</span>                        // install shutdown hook<a name="line.295"></a>
<span class="sourceLineNo">296</span><a name="line.296"></a>
<span class="sourceLineNo">297</span>                        Runtime.getRuntime().addShutdownHook(hook = new WebcamShutdownHook(this));<a name="line.297"></a>
<span class="sourceLineNo">298</span><a name="line.298"></a>
<span class="sourceLineNo">299</span>                        // notify listeners<a name="line.299"></a>
<span class="sourceLineNo">300</span><a name="line.300"></a>
<span class="sourceLineNo">301</span>                        WebcamEvent we = new WebcamEvent(WebcamEventType.OPEN, this);<a name="line.301"></a>
<span class="sourceLineNo">302</span>                        Iterator&lt;WebcamListener&gt; wli = listeners.iterator();<a name="line.302"></a>
<span class="sourceLineNo">303</span>                        WebcamListener l = null;<a name="line.303"></a>
<span class="sourceLineNo">304</span><a name="line.304"></a>
<span class="sourceLineNo">305</span>                        while (wli.hasNext()) {<a name="line.305"></a>
<span class="sourceLineNo">306</span>                                l = wli.next();<a name="line.306"></a>
<span class="sourceLineNo">307</span>                                try {<a name="line.307"></a>
<span class="sourceLineNo">308</span>                                        l.webcamOpen(we);<a name="line.308"></a>
<span class="sourceLineNo">309</span>                                } catch (Exception e) {<a name="line.309"></a>
<span class="sourceLineNo">310</span>                                        LOG.error(String.format("Notify webcam open, exception when calling listener %s", l.getClass()), e);<a name="line.310"></a>
<span class="sourceLineNo">311</span>                                }<a name="line.311"></a>
<span class="sourceLineNo">312</span>                        }<a name="line.312"></a>
<span class="sourceLineNo">313</span><a name="line.313"></a>
<span class="sourceLineNo">314</span>                } else {<a name="line.314"></a>
<span class="sourceLineNo">315</span>                        LOG.debug("Webcam is already open {}", getName());<a name="line.315"></a>
<span class="sourceLineNo">316</span>                }<a name="line.316"></a>
<span class="sourceLineNo">317</span><a name="line.317"></a>
<span class="sourceLineNo">318</span>                return true;<a name="line.318"></a>
<span class="sourceLineNo">319</span>        }<a name="line.319"></a>
<span class="sourceLineNo">320</span><a name="line.320"></a>
<span class="sourceLineNo">321</span>        /**<a name="line.321"></a>
<span class="sourceLineNo">322</span>         * Close the webcam.<a name="line.322"></a>
<span class="sourceLineNo">323</span>         *<a name="line.323"></a>
<span class="sourceLineNo">324</span>         * @return True if webcam has been open, false otherwise<a name="line.324"></a>
<span class="sourceLineNo">325</span>         */<a name="line.325"></a>
<span class="sourceLineNo">326</span>        public boolean close() {<a name="line.326"></a>
<span class="sourceLineNo">327</span><a name="line.327"></a>
<span class="sourceLineNo">328</span>                if (open.compareAndSet(true, false)) {<a name="line.328"></a>
<span class="sourceLineNo">329</span><a name="line.329"></a>
<span class="sourceLineNo">330</span>                        LOG.debug("Closing webcam {}", getName());<a name="line.330"></a>
<span class="sourceLineNo">331</span><a name="line.331"></a>
<span class="sourceLineNo">332</span>                        assert lock != null;<a name="line.332"></a>
<span class="sourceLineNo">333</span><a name="line.333"></a>
<span class="sourceLineNo">334</span>                        // close webcam<a name="line.334"></a>
<span class="sourceLineNo">335</span><a name="line.335"></a>
<span class="sourceLineNo">336</span>                        WebcamCloseTask task = new WebcamCloseTask(driver, device);<a name="line.336"></a>
<span class="sourceLineNo">337</span>                        try {<a name="line.337"></a>
<span class="sourceLineNo">338</span>                                task.close();<a name="line.338"></a>
<span class="sourceLineNo">339</span>                        } catch (InterruptedException e) {<a name="line.339"></a>
<span class="sourceLineNo">340</span>                                open.set(true);<a name="line.340"></a>
<span class="sourceLineNo">341</span>                                LOG.debug("Thread has been interrupted before webcam was closed!", e);<a name="line.341"></a>
<span class="sourceLineNo">342</span>                                return false;<a name="line.342"></a>
<span class="sourceLineNo">343</span>                        } catch (WebcamException e) {<a name="line.343"></a>
<span class="sourceLineNo">344</span>                                open.set(true);<a name="line.344"></a>
<span class="sourceLineNo">345</span>                                throw e;<a name="line.345"></a>
<span class="sourceLineNo">346</span>                        }<a name="line.346"></a>
<span class="sourceLineNo">347</span><a name="line.347"></a>
<span class="sourceLineNo">348</span>                        // stop updater<a name="line.348"></a>
<span class="sourceLineNo">349</span>                        if (asynchronous) {<a name="line.349"></a>
<span class="sourceLineNo">350</span>                                updater.stop();<a name="line.350"></a>
<span class="sourceLineNo">351</span>                        }<a name="line.351"></a>
<span class="sourceLineNo">352</span><a name="line.352"></a>
<span class="sourceLineNo">353</span>                        // remove shutdown hook (it's not more necessary)<a name="line.353"></a>
<span class="sourceLineNo">354</span>                        removeShutdownHook();<a name="line.354"></a>
<span class="sourceLineNo">355</span><a name="line.355"></a>
<span class="sourceLineNo">356</span>                        // unlock webcam so other Java processes can start using it<a name="line.356"></a>
<span class="sourceLineNo">357</span>                        lock.unlock();<a name="line.357"></a>
<span class="sourceLineNo">358</span><a name="line.358"></a>
<span class="sourceLineNo">359</span>                        // notify listeners<a name="line.359"></a>
<span class="sourceLineNo">360</span><a name="line.360"></a>
<span class="sourceLineNo">361</span>                        WebcamEvent we = new WebcamEvent(WebcamEventType.CLOSED, this);<a name="line.361"></a>
<span class="sourceLineNo">362</span>                        Iterator&lt;WebcamListener&gt; wli = listeners.iterator();<a name="line.362"></a>
<span class="sourceLineNo">363</span>                        WebcamListener l = null;<a name="line.363"></a>
<span class="sourceLineNo">364</span><a name="line.364"></a>
<span class="sourceLineNo">365</span>                        while (wli.hasNext()) {<a name="line.365"></a>
<span class="sourceLineNo">366</span>                                l = wli.next();<a name="line.366"></a>
<span class="sourceLineNo">367</span>                                try {<a name="line.367"></a>
<span class="sourceLineNo">368</span>                                        l.webcamClosed(we);<a name="line.368"></a>
<span class="sourceLineNo">369</span>                                } catch (Exception e) {<a name="line.369"></a>
<span class="sourceLineNo">370</span>                                        LOG.error(String.format("Notify webcam closed, exception when calling %s listener", l.getClass()), e);<a name="line.370"></a>
<span class="sourceLineNo">371</span>                                }<a name="line.371"></a>
<span class="sourceLineNo">372</span>                        }<a name="line.372"></a>
<span class="sourceLineNo">373</span><a name="line.373"></a>
<span class="sourceLineNo">374</span>                        notificator.shutdown();<a name="line.374"></a>
<span class="sourceLineNo">375</span>                        while (!notificator.isTerminated()) {<a name="line.375"></a>
<span class="sourceLineNo">376</span>                                try {<a name="line.376"></a>
<span class="sourceLineNo">377</span>                                        notificator.awaitTermination(100, TimeUnit.MILLISECONDS);<a name="line.377"></a>
<span class="sourceLineNo">378</span>                                } catch (InterruptedException e) {<a name="line.378"></a>
<span class="sourceLineNo">379</span>                                        return false;<a name="line.379"></a>
<span class="sourceLineNo">380</span>                                }<a name="line.380"></a>
<span class="sourceLineNo">381</span>                        }<a name="line.381"></a>
<span class="sourceLineNo">382</span><a name="line.382"></a>
<span class="sourceLineNo">383</span>                        LOG.debug("Webcam {} has been closed", getName());<a name="line.383"></a>
<span class="sourceLineNo">384</span><a name="line.384"></a>
<span class="sourceLineNo">385</span>                } else {<a name="line.385"></a>
<span class="sourceLineNo">386</span>                        LOG.debug("Webcam {} is already closed", getName());<a name="line.386"></a>
<span class="sourceLineNo">387</span>                }<a name="line.387"></a>
<span class="sourceLineNo">388</span><a name="line.388"></a>
<span class="sourceLineNo">389</span>                return true;<a name="line.389"></a>
<span class="sourceLineNo">390</span>        }<a name="line.390"></a>
<span class="sourceLineNo">391</span><a name="line.391"></a>
<span class="sourceLineNo">392</span>        /**<a name="line.392"></a>
<span class="sourceLineNo">393</span>         * Return underlying webcam device. Depending on the driver used to discover devices, this<a name="line.393"></a>
<span class="sourceLineNo">394</span>         * method can return instances of different class. By default {@link WebcamDefaultDevice} is<a name="line.394"></a>
<span class="sourceLineNo">395</span>         * returned when no external driver is used.<a name="line.395"></a>
<span class="sourceLineNo">396</span>         *<a name="line.396"></a>
<span class="sourceLineNo">397</span>         * @return Underlying webcam device instance<a name="line.397"></a>
<span class="sourceLineNo">398</span>         */<a name="line.398"></a>
<span class="sourceLineNo">399</span>        public WebcamDevice getDevice() {<a name="line.399"></a>
<span class="sourceLineNo">400</span>                assert device != null;<a name="line.400"></a>
<span class="sourceLineNo">401</span>                return device;<a name="line.401"></a>
<span class="sourceLineNo">402</span>        }<a name="line.402"></a>
<span class="sourceLineNo">403</span><a name="line.403"></a>
<span class="sourceLineNo">404</span>        /**<a name="line.404"></a>
<span class="sourceLineNo">405</span>         * Completely dispose capture device. After this operation webcam cannot be used any more and<a name="line.405"></a>
<span class="sourceLineNo">406</span>         * full reinstantiation is required.<a name="line.406"></a>
<span class="sourceLineNo">407</span>         */<a name="line.407"></a>
<span class="sourceLineNo">408</span>        protected void dispose() {<a name="line.408"></a>
<span class="sourceLineNo">409</span><a name="line.409"></a>
<span class="sourceLineNo">410</span>                assert disposed != null;<a name="line.410"></a>
<span class="sourceLineNo">411</span>                assert open != null;<a name="line.411"></a>
<span class="sourceLineNo">412</span>                assert driver != null;<a name="line.412"></a>
<span class="sourceLineNo">413</span>                assert device != null;<a name="line.413"></a>
<span class="sourceLineNo">414</span>                assert listeners != null;<a name="line.414"></a>
<span class="sourceLineNo">415</span><a name="line.415"></a>
<span class="sourceLineNo">416</span>                if (!disposed.compareAndSet(false, true)) {<a name="line.416"></a>
<span class="sourceLineNo">417</span>                        return;<a name="line.417"></a>
<span class="sourceLineNo">418</span>                }<a name="line.418"></a>
<span class="sourceLineNo">419</span><a name="line.419"></a>
<span class="sourceLineNo">420</span>                open.set(false);<a name="line.420"></a>
<span class="sourceLineNo">421</span><a name="line.421"></a>
<span class="sourceLineNo">422</span>                LOG.info("Disposing webcam {}", getName());<a name="line.422"></a>
<span class="sourceLineNo">423</span><a name="line.423"></a>
<span class="sourceLineNo">424</span>                WebcamDisposeTask task = new WebcamDisposeTask(driver, device);<a name="line.424"></a>
<span class="sourceLineNo">425</span>                try {<a name="line.425"></a>
<span class="sourceLineNo">426</span>                        task.dispose();<a name="line.426"></a>
<span class="sourceLineNo">427</span>                } catch (InterruptedException e) {<a name="line.427"></a>
<span class="sourceLineNo">428</span>                        LOG.error("Processor has been interrupted before webcam was disposed!", e);<a name="line.428"></a>
<span class="sourceLineNo">429</span>                        return;<a name="line.429"></a>
<span class="sourceLineNo">430</span>                }<a name="line.430"></a>
<span class="sourceLineNo">431</span><a name="line.431"></a>
<span class="sourceLineNo">432</span>                WebcamEvent we = new WebcamEvent(WebcamEventType.DISPOSED, this);<a name="line.432"></a>
<span class="sourceLineNo">433</span>                Iterator&lt;WebcamListener&gt; wli = listeners.iterator();<a name="line.433"></a>
<span class="sourceLineNo">434</span>                WebcamListener l = null;<a name="line.434"></a>
<span class="sourceLineNo">435</span><a name="line.435"></a>
<span class="sourceLineNo">436</span>                while (wli.hasNext()) {<a name="line.436"></a>
<span class="sourceLineNo">437</span>                        l = wli.next();<a name="line.437"></a>
<span class="sourceLineNo">438</span>                        try {<a name="line.438"></a>
<span class="sourceLineNo">439</span>                                l.webcamClosed(we);<a name="line.439"></a>
<span class="sourceLineNo">440</span>                                l.webcamDisposed(we);<a name="line.440"></a>
<span class="sourceLineNo">441</span>                        } catch (Exception e) {<a name="line.441"></a>
<span class="sourceLineNo">442</span>                                LOG.error(String.format("Notify webcam disposed, exception when calling %s listener", l.getClass()), e);<a name="line.442"></a>
<span class="sourceLineNo">443</span>                        }<a name="line.443"></a>
<span class="sourceLineNo">444</span>                }<a name="line.444"></a>
<span class="sourceLineNo">445</span><a name="line.445"></a>
<span class="sourceLineNo">446</span>                removeShutdownHook();<a name="line.446"></a>
<span class="sourceLineNo">447</span><a name="line.447"></a>
<span class="sourceLineNo">448</span>                LOG.debug("Webcam disposed {}", getName());<a name="line.448"></a>
<span class="sourceLineNo">449</span>        }<a name="line.449"></a>
<span class="sourceLineNo">450</span><a name="line.450"></a>
<span class="sourceLineNo">451</span>        private void removeShutdownHook() {<a name="line.451"></a>
<span class="sourceLineNo">452</span><a name="line.452"></a>
<span class="sourceLineNo">453</span>                // hook can be null because there is a possibility that webcam has never<a name="line.453"></a>
<span class="sourceLineNo">454</span>                // been open and therefore hook was not created<a name="line.454"></a>
<span class="sourceLineNo">455</span><a name="line.455"></a>
<span class="sourceLineNo">456</span>                if (hook != null) {<a name="line.456"></a>
<span class="sourceLineNo">457</span>                        try {<a name="line.457"></a>
<span class="sourceLineNo">458</span>                                Runtime.getRuntime().removeShutdownHook(hook);<a name="line.458"></a>
<span class="sourceLineNo">459</span>                        } catch (IllegalStateException e) {<a name="line.459"></a>
<span class="sourceLineNo">460</span>                                LOG.trace("Shutdown in progress, cannot remove hook");<a name="line.460"></a>
<span class="sourceLineNo">461</span>                        }<a name="line.461"></a>
<span class="sourceLineNo">462</span>                }<a name="line.462"></a>
<span class="sourceLineNo">463</span>        }<a name="line.463"></a>
<span class="sourceLineNo">464</span><a name="line.464"></a>
<span class="sourceLineNo">465</span>        /**<a name="line.465"></a>
<span class="sourceLineNo">466</span>         * TRansform image using image transformer. If image transformer has not been set, this method<a name="line.466"></a>
<span class="sourceLineNo">467</span>         * return instance passed in the argument, without any modifications.<a name="line.467"></a>
<span class="sourceLineNo">468</span>         *<a name="line.468"></a>
<span class="sourceLineNo">469</span>         * @param image the image to be transformed<a name="line.469"></a>
<span class="sourceLineNo">470</span>         * @return Transformed image (if transformer is set)<a name="line.470"></a>
<span class="sourceLineNo">471</span>         */<a name="line.471"></a>
<span class="sourceLineNo">472</span>        protected BufferedImage transform(BufferedImage image) {<a name="line.472"></a>
<span class="sourceLineNo">473</span>                if (image != null) {<a name="line.473"></a>
<span class="sourceLineNo">474</span>                        WebcamImageTransformer tr = getImageTransformer();<a name="line.474"></a>
<span class="sourceLineNo">475</span>                        if (tr != null) {<a name="line.475"></a>
<span class="sourceLineNo">476</span>                                return tr.transform(image);<a name="line.476"></a>
<span class="sourceLineNo">477</span>                        }<a name="line.477"></a>
<span class="sourceLineNo">478</span>                }<a name="line.478"></a>
<span class="sourceLineNo">479</span>                return image;<a name="line.479"></a>
<span class="sourceLineNo">480</span>        }<a name="line.480"></a>
<span class="sourceLineNo">481</span><a name="line.481"></a>
<span class="sourceLineNo">482</span>        /**<a name="line.482"></a>
<span class="sourceLineNo">483</span>         * Is webcam open?<a name="line.483"></a>
<span class="sourceLineNo">484</span>         *<a name="line.484"></a>
<span class="sourceLineNo">485</span>         * @return true if open, false otherwise<a name="line.485"></a>
<span class="sourceLineNo">486</span>         */<a name="line.486"></a>
<span class="sourceLineNo">487</span>        public boolean isOpen() {<a name="line.487"></a>
<span class="sourceLineNo">488</span>                return open.get();<a name="line.488"></a>
<span class="sourceLineNo">489</span>        }<a name="line.489"></a>
<span class="sourceLineNo">490</span><a name="line.490"></a>
<span class="sourceLineNo">491</span>        /**<a name="line.491"></a>
<span class="sourceLineNo">492</span>         * Get current webcam resolution in pixels.<a name="line.492"></a>
<span class="sourceLineNo">493</span>         *<a name="line.493"></a>
<span class="sourceLineNo">494</span>         * @return Webcam resolution (picture size) in pixels.<a name="line.494"></a>
<span class="sourceLineNo">495</span>         */<a name="line.495"></a>
<span class="sourceLineNo">496</span>        public Dimension getViewSize() {<a name="line.496"></a>
<span class="sourceLineNo">497</span>                return device.getResolution();<a name="line.497"></a>
<span class="sourceLineNo">498</span>        }<a name="line.498"></a>
<span class="sourceLineNo">499</span><a name="line.499"></a>
<span class="sourceLineNo">500</span>        /**<a name="line.500"></a>
<span class="sourceLineNo">501</span>         * Return list of supported view sizes. It can differ between vary webcam data sources.<a name="line.501"></a>
<span class="sourceLineNo">502</span>         *<a name="line.502"></a>
<span class="sourceLineNo">503</span>         * @return Array of supported dimensions<a name="line.503"></a>
<span class="sourceLineNo">504</span>         */<a name="line.504"></a>
<span class="sourceLineNo">505</span>        public Dimension[] getViewSizes() {<a name="line.505"></a>
<span class="sourceLineNo">506</span>                return device.getResolutions();<a name="line.506"></a>
<span class="sourceLineNo">507</span>        }<a name="line.507"></a>
<span class="sourceLineNo">508</span><a name="line.508"></a>
<span class="sourceLineNo">509</span>        /**<a name="line.509"></a>
<span class="sourceLineNo">510</span>         * Set custom resolution. If you are using this method you have to make sure that your webcam<a name="line.510"></a>
<span class="sourceLineNo">511</span>         * device can support this specific resolution.<a name="line.511"></a>
<span class="sourceLineNo">512</span>         *<a name="line.512"></a>
<span class="sourceLineNo">513</span>         * @param sizes the array of custom resolutions to be supported by webcam<a name="line.513"></a>
<span class="sourceLineNo">514</span>         */<a name="line.514"></a>
<span class="sourceLineNo">515</span>        public void setCustomViewSizes(Dimension[] sizes) {<a name="line.515"></a>
<span class="sourceLineNo">516</span>                assert customSizes != null;<a name="line.516"></a>
<span class="sourceLineNo">517</span>                if (sizes == null) {<a name="line.517"></a>
<span class="sourceLineNo">518</span>                        customSizes.clear();<a name="line.518"></a>
<span class="sourceLineNo">519</span>                        return;<a name="line.519"></a>
<span class="sourceLineNo">520</span>                }<a name="line.520"></a>
<span class="sourceLineNo">521</span>                customSizes = Arrays.asList(sizes);<a name="line.521"></a>
<span class="sourceLineNo">522</span>        }<a name="line.522"></a>
<span class="sourceLineNo">523</span><a name="line.523"></a>
<span class="sourceLineNo">524</span>        public Dimension[] getCustomViewSizes() {<a name="line.524"></a>
<span class="sourceLineNo">525</span>                assert customSizes != null;<a name="line.525"></a>
<span class="sourceLineNo">526</span>                return customSizes.toArray(new Dimension[customSizes.size()]);<a name="line.526"></a>
<span class="sourceLineNo">527</span>        }<a name="line.527"></a>
<span class="sourceLineNo">528</span><a name="line.528"></a>
<span class="sourceLineNo">529</span>        /**<a name="line.529"></a>
<span class="sourceLineNo">530</span>         * Set new view size. New size has to exactly the same as one of the default sized or exactly<a name="line.530"></a>
<span class="sourceLineNo">531</span>         * the same as one of the custom ones.<a name="line.531"></a>
<span class="sourceLineNo">532</span>         *<a name="line.532"></a>
<span class="sourceLineNo">533</span>         * @param size the new view size to be set<a name="line.533"></a>
<span class="sourceLineNo">534</span>         * @see Webcam#setCustomViewSizes(Dimension[])<a name="line.534"></a>
<span class="sourceLineNo">535</span>         * @see Webcam#getViewSizes()<a name="line.535"></a>
<span class="sourceLineNo">536</span>         */<a name="line.536"></a>
<span class="sourceLineNo">537</span>        public void setViewSize(Dimension size) {<a name="line.537"></a>
<span class="sourceLineNo">538</span><a name="line.538"></a>
<span class="sourceLineNo">539</span>                if (size == null) {<a name="line.539"></a>
<span class="sourceLineNo">540</span>                        throw new IllegalArgumentException("Resolution cannot be null!");<a name="line.540"></a>
<span class="sourceLineNo">541</span>                }<a name="line.541"></a>
<span class="sourceLineNo">542</span><a name="line.542"></a>
<span class="sourceLineNo">543</span>                if (open.get()) {<a name="line.543"></a>
<span class="sourceLineNo">544</span>                        throw new IllegalStateException("Cannot change resolution when webcam is open, please close it first");<a name="line.544"></a>
<span class="sourceLineNo">545</span>                }<a name="line.545"></a>
<span class="sourceLineNo">546</span><a name="line.546"></a>
<span class="sourceLineNo">547</span>                // check if new resolution is the same as current one<a name="line.547"></a>
<span class="sourceLineNo">548</span><a name="line.548"></a>
<span class="sourceLineNo">549</span>                Dimension current = getViewSize();<a name="line.549"></a>
<span class="sourceLineNo">550</span>                if (current != null &amp;&amp; current.width == size.width &amp;&amp; current.height == size.height) {<a name="line.550"></a>
<span class="sourceLineNo">551</span>                        return;<a name="line.551"></a>
<span class="sourceLineNo">552</span>                }<a name="line.552"></a>
<span class="sourceLineNo">553</span><a name="line.553"></a>
<span class="sourceLineNo">554</span>                // check if new resolution is valid<a name="line.554"></a>
<span class="sourceLineNo">555</span><a name="line.555"></a>
<span class="sourceLineNo">556</span>                Dimension[] predefined = getViewSizes();<a name="line.556"></a>
<span class="sourceLineNo">557</span>                Dimension[] custom = getCustomViewSizes();<a name="line.557"></a>
<span class="sourceLineNo">558</span><a name="line.558"></a>
<span class="sourceLineNo">559</span>                assert predefined != null;<a name="line.559"></a>
<span class="sourceLineNo">560</span>                assert custom != null;<a name="line.560"></a>
<span class="sourceLineNo">561</span><a name="line.561"></a>
<span class="sourceLineNo">562</span>                boolean ok = false;<a name="line.562"></a>
<span class="sourceLineNo">563</span>                for (Dimension d : predefined) {<a name="line.563"></a>
<span class="sourceLineNo">564</span>                        if (d.width == size.width &amp;&amp; d.height == size.height) {<a name="line.564"></a>
<span class="sourceLineNo">565</span>                                ok = true;<a name="line.565"></a>
<span class="sourceLineNo">566</span>                                break;<a name="line.566"></a>
<span class="sourceLineNo">567</span>                        }<a name="line.567"></a>
<span class="sourceLineNo">568</span>                }<a name="line.568"></a>
<span class="sourceLineNo">569</span>                if (!ok) {<a name="line.569"></a>
<span class="sourceLineNo">570</span>                        for (Dimension d : custom) {<a name="line.570"></a>
<span class="sourceLineNo">571</span>                                if (d.width == size.width &amp;&amp; d.height == size.height) {<a name="line.571"></a>
<span class="sourceLineNo">572</span>                                        ok = true;<a name="line.572"></a>
<span class="sourceLineNo">573</span>                                        break;<a name="line.573"></a>
<span class="sourceLineNo">574</span>                                }<a name="line.574"></a>
<span class="sourceLineNo">575</span>                        }<a name="line.575"></a>
<span class="sourceLineNo">576</span>                }<a name="line.576"></a>
<span class="sourceLineNo">577</span><a name="line.577"></a>
<span class="sourceLineNo">578</span>                if (!ok) {<a name="line.578"></a>
<span class="sourceLineNo">579</span>                        StringBuilder sb = new StringBuilder("Incorrect dimension [");<a name="line.579"></a>
<span class="sourceLineNo">580</span>                        sb.append(size.width).append("x").append(size.height).append("] ");<a name="line.580"></a>
<span class="sourceLineNo">581</span>                        sb.append("possible ones are ");<a name="line.581"></a>
<span class="sourceLineNo">582</span>                        for (Dimension d : predefined) {<a name="line.582"></a>
<span class="sourceLineNo">583</span>                                sb.append("[").append(d.width).append("x").append(d.height).append("] ");<a name="line.583"></a>
<span class="sourceLineNo">584</span>                        }<a name="line.584"></a>
<span class="sourceLineNo">585</span>                        for (Dimension d : custom) {<a name="line.585"></a>
<span class="sourceLineNo">586</span>                                sb.append("[").append(d.width).append("x").append(d.height).append("] ");<a name="line.586"></a>
<span class="sourceLineNo">587</span>                        }<a name="line.587"></a>
<span class="sourceLineNo">588</span>                        throw new IllegalArgumentException(sb.toString());<a name="line.588"></a>
<span class="sourceLineNo">589</span>                }<a name="line.589"></a>
<span class="sourceLineNo">590</span><a name="line.590"></a>
<span class="sourceLineNo">591</span>                LOG.debug("Setting new resolution {}x{}", size.width, size.height);<a name="line.591"></a>
<span class="sourceLineNo">592</span><a name="line.592"></a>
<span class="sourceLineNo">593</span>                device.setResolution(size);<a name="line.593"></a>
<span class="sourceLineNo">594</span>        }<a name="line.594"></a>
<span class="sourceLineNo">595</span><a name="line.595"></a>
<span class="sourceLineNo">596</span>        /**<a name="line.596"></a>
<span class="sourceLineNo">597</span>         * Capture image from webcam and return it. Will return image object or null if webcam is closed<a name="line.597"></a>
<span class="sourceLineNo">598</span>         * or has been already disposed by JVM.&lt;br&gt;<a name="line.598"></a>
<span class="sourceLineNo">599</span>         * &lt;br&gt;<a name="line.599"></a>
<span class="sourceLineNo">600</span>         * &lt;b&gt;IMPORTANT NOTE!!!&lt;/b&gt;&lt;br&gt;<a name="line.600"></a>
<span class="sourceLineNo">601</span>         * &lt;br&gt;<a name="line.601"></a>
<span class="sourceLineNo">602</span>         * There are two possible behaviors of what webcam should do when you try to get image and<a name="line.602"></a>
<span class="sourceLineNo">603</span>         * webcam is actually closed. Normally it will return null, but there is a special flag which<a name="line.603"></a>
<span class="sourceLineNo">604</span>         * can be statically set to switch all webcams to auto open mode. In this mode, webcam will be<a name="line.604"></a>
<span class="sourceLineNo">605</span>         * automatically open, when you try to get image from closed webcam. Please be aware of some<a name="line.605"></a>
<span class="sourceLineNo">606</span>         * side effects! In case of multi-threaded applications, there is no guarantee that one thread<a name="line.606"></a>
<span class="sourceLineNo">607</span>         * will not try to open webcam even if it was manually closed in different thread.<a name="line.607"></a>
<span class="sourceLineNo">608</span>         *<a name="line.608"></a>
<span class="sourceLineNo">609</span>         * @return Captured image or null if webcam is closed or disposed by JVM<a name="line.609"></a>
<span class="sourceLineNo">610</span>         */<a name="line.610"></a>
<span class="sourceLineNo">611</span>        public BufferedImage getImage() {<a name="line.611"></a>
<span class="sourceLineNo">612</span><a name="line.612"></a>
<span class="sourceLineNo">613</span>                if (!isReady()) {<a name="line.613"></a>
<span class="sourceLineNo">614</span>                        return null;<a name="line.614"></a>
<span class="sourceLineNo">615</span>                }<a name="line.615"></a>
<span class="sourceLineNo">616</span><a name="line.616"></a>
<span class="sourceLineNo">617</span>                long t1 = 0;<a name="line.617"></a>
<span class="sourceLineNo">618</span>                long t2 = 0;<a name="line.618"></a>
<span class="sourceLineNo">619</span><a name="line.619"></a>
<span class="sourceLineNo">620</span>                if (asynchronous) {<a name="line.620"></a>
<span class="sourceLineNo">621</span>                        return updater.getImage();<a name="line.621"></a>
<span class="sourceLineNo">622</span>                } else {<a name="line.622"></a>
<span class="sourceLineNo">623</span><a name="line.623"></a>
<span class="sourceLineNo">624</span>                        // get image<a name="line.624"></a>
<span class="sourceLineNo">625</span><a name="line.625"></a>
<span class="sourceLineNo">626</span>                        t1 = System.currentTimeMillis();<a name="line.626"></a>
<span class="sourceLineNo">627</span>                        BufferedImage image = transform(new WebcamGetImageTask(driver, device).getImage());<a name="line.627"></a>
<span class="sourceLineNo">628</span>                        t2 = System.currentTimeMillis();<a name="line.628"></a>
<span class="sourceLineNo">629</span><a name="line.629"></a>
<span class="sourceLineNo">630</span>                        if (image == null) {<a name="line.630"></a>
<span class="sourceLineNo">631</span>                                return null;<a name="line.631"></a>
<span class="sourceLineNo">632</span>                        }<a name="line.632"></a>
<span class="sourceLineNo">633</span><a name="line.633"></a>
<span class="sourceLineNo">634</span>                        // get FPS<a name="line.634"></a>
<span class="sourceLineNo">635</span><a name="line.635"></a>
<span class="sourceLineNo">636</span>                        if (device instanceof WebcamDevice.FPSSource) {<a name="line.636"></a>
<span class="sourceLineNo">637</span>                                fps = ((WebcamDevice.FPSSource) device).getFPS();<a name="line.637"></a>
<span class="sourceLineNo">638</span>                        } else {<a name="line.638"></a>
<span class="sourceLineNo">639</span>                                // +1 to avoid division by zero<a name="line.639"></a>
<span class="sourceLineNo">640</span>                                fps = (4 * fps + 1000 / (t2 - t1 + 1)) / 5;<a name="line.640"></a>
<span class="sourceLineNo">641</span>                        }<a name="line.641"></a>
<span class="sourceLineNo">642</span><a name="line.642"></a>
<span class="sourceLineNo">643</span>                        // notify webcam listeners about new image available<a name="line.643"></a>
<span class="sourceLineNo">644</span><a name="line.644"></a>
<span class="sourceLineNo">645</span>                        notifyWebcamImageAcquired(image);<a name="line.645"></a>
<span class="sourceLineNo">646</span><a name="line.646"></a>
<span class="sourceLineNo">647</span>                        return image;<a name="line.647"></a>
<span class="sourceLineNo">648</span>                }<a name="line.648"></a>
<span class="sourceLineNo">649</span>        }<a name="line.649"></a>
<span class="sourceLineNo">650</span><a name="line.650"></a>
<span class="sourceLineNo">651</span>        public boolean isImageNew() {<a name="line.651"></a>
<span class="sourceLineNo">652</span>                if (asynchronous) {<a name="line.652"></a>
<span class="sourceLineNo">653</span>                        return updater.isImageNew();<a name="line.653"></a>
<span class="sourceLineNo">654</span>                }<a name="line.654"></a>
<span class="sourceLineNo">655</span>                return true;<a name="line.655"></a>
<span class="sourceLineNo">656</span>        }<a name="line.656"></a>
<span class="sourceLineNo">657</span><a name="line.657"></a>
<span class="sourceLineNo">658</span>        public double getFPS() {<a name="line.658"></a>
<span class="sourceLineNo">659</span>                if (asynchronous) {<a name="line.659"></a>
<span class="sourceLineNo">660</span>                        return updater.getFPS();<a name="line.660"></a>
<span class="sourceLineNo">661</span>                } else {<a name="line.661"></a>
<span class="sourceLineNo">662</span>                        return fps;<a name="line.662"></a>
<span class="sourceLineNo">663</span>                }<a name="line.663"></a>
<span class="sourceLineNo">664</span>        }<a name="line.664"></a>
<span class="sourceLineNo">665</span><a name="line.665"></a>
<span class="sourceLineNo">666</span>        /**<a name="line.666"></a>
<span class="sourceLineNo">667</span>         * Get RAW image ByteBuffer. It will always return buffer with 3 x 1 bytes per each pixel, where<a name="line.667"></a>
<span class="sourceLineNo">668</span>         * RGB components are on (0, 1, 2) and color space is sRGB.&lt;br&gt;<a name="line.668"></a>
<span class="sourceLineNo">669</span>         * &lt;br&gt;<a name="line.669"></a>
<span class="sourceLineNo">670</span>         * &lt;b&gt;IMPORTANT!&lt;/b&gt;&lt;br&gt;<a name="line.670"></a>
<span class="sourceLineNo">671</span>         * Some drivers can return direct ByteBuffer, so there is no guarantee that underlying bytes<a name="line.671"></a>
<span class="sourceLineNo">672</span>         * will not be released in next read image operation. Therefore, to avoid potential bugs you<a name="line.672"></a>
<span class="sourceLineNo">673</span>         * should convert this ByteBuffer to bytes array before you fetch next image.<a name="line.673"></a>
<span class="sourceLineNo">674</span>         *<a name="line.674"></a>
<span class="sourceLineNo">675</span>         * @return Byte buffer<a name="line.675"></a>
<span class="sourceLineNo">676</span>         */<a name="line.676"></a>
<span class="sourceLineNo">677</span>        public ByteBuffer getImageBytes() {<a name="line.677"></a>
<span class="sourceLineNo">678</span><a name="line.678"></a>
<span class="sourceLineNo">679</span>                if (!isReady()) {<a name="line.679"></a>
<span class="sourceLineNo">680</span>                        return null;<a name="line.680"></a>
<span class="sourceLineNo">681</span>                }<a name="line.681"></a>
<span class="sourceLineNo">682</span><a name="line.682"></a>
<span class="sourceLineNo">683</span>                assert driver != null;<a name="line.683"></a>
<span class="sourceLineNo">684</span>                assert device != null;<a name="line.684"></a>
<span class="sourceLineNo">685</span><a name="line.685"></a>
<span class="sourceLineNo">686</span>                // some devices can support direct image buffers, and for those call<a name="line.686"></a>
<span class="sourceLineNo">687</span>                // processor task, and for those which does not support direct image<a name="line.687"></a>
<span class="sourceLineNo">688</span>                // buffers, just convert image to RGB byte array<a name="line.688"></a>
<span class="sourceLineNo">689</span><a name="line.689"></a>
<span class="sourceLineNo">690</span>                if (device instanceof BufferAccess) {<a name="line.690"></a>
<span class="sourceLineNo">691</span>                        return new WebcamGetBufferTask(driver, device).getBuffer();<a name="line.691"></a>
<span class="sourceLineNo">692</span>                } else {<a name="line.692"></a>
<span class="sourceLineNo">693</span>                        throw new IllegalStateException(String.format("Driver %s does not support buffer access", driver.getClass().getName()));<a name="line.693"></a>
<span class="sourceLineNo">694</span>                }<a name="line.694"></a>
<span class="sourceLineNo">695</span>        }<a name="line.695"></a>
<span class="sourceLineNo">696</span><a name="line.696"></a>
<span class="sourceLineNo">697</span>        /**<a name="line.697"></a>
<span class="sourceLineNo">698</span>         * Get RAW image ByteBuffer. It will always return buffer with 3 x 1 bytes per each pixel, where<a name="line.698"></a>
<span class="sourceLineNo">699</span>         * RGB components are on (0, 1, 2) and color space is sRGB.&lt;br&gt;<a name="line.699"></a>
<span class="sourceLineNo">700</span>         * &lt;br&gt;<a name="line.700"></a>
<span class="sourceLineNo">701</span>         * &lt;b&gt;IMPORTANT!&lt;/b&gt;&lt;br&gt;<a name="line.701"></a>
<span class="sourceLineNo">702</span>         * Some drivers can return direct ByteBuffer, so there is no guarantee that underlying bytes<a name="line.702"></a>
<span class="sourceLineNo">703</span>         * will not be released in next read image operation. Therefore, to avoid potential bugs you<a name="line.703"></a>
<span class="sourceLineNo">704</span>         * should convert this ByteBuffer to bytes array before you fetch next image.<a name="line.704"></a>
<span class="sourceLineNo">705</span>         *<a name="line.705"></a>
<span class="sourceLineNo">706</span>         * @param target the target {@link ByteBuffer} object to copy data into<a name="line.706"></a>
<span class="sourceLineNo">707</span>         */<a name="line.707"></a>
<span class="sourceLineNo">708</span>        public void getImageBytes(ByteBuffer target) {<a name="line.708"></a>
<span class="sourceLineNo">709</span><a name="line.709"></a>
<span class="sourceLineNo">710</span>                if (!isReady()) {<a name="line.710"></a>
<span class="sourceLineNo">711</span>                        return;<a name="line.711"></a>
<span class="sourceLineNo">712</span>                }<a name="line.712"></a>
<span class="sourceLineNo">713</span><a name="line.713"></a>
<span class="sourceLineNo">714</span>                assert driver != null;<a name="line.714"></a>
<span class="sourceLineNo">715</span>                assert device != null;<a name="line.715"></a>
<span class="sourceLineNo">716</span><a name="line.716"></a>
<span class="sourceLineNo">717</span>                // some devices can support direct image buffers, and for those call<a name="line.717"></a>
<span class="sourceLineNo">718</span>                // processor task, and for those which does not support direct image<a name="line.718"></a>
<span class="sourceLineNo">719</span>                // buffers, just convert image to RGB byte array<a name="line.719"></a>
<span class="sourceLineNo">720</span><a name="line.720"></a>
<span class="sourceLineNo">721</span>                if (device instanceof BufferAccess) {<a name="line.721"></a>
<span class="sourceLineNo">722</span>                        new WebcamReadBufferTask(driver, device, target).readBuffer();<a name="line.722"></a>
<span class="sourceLineNo">723</span>                } else {<a name="line.723"></a>
<span class="sourceLineNo">724</span>                        throw new IllegalStateException(String.format("Driver %s does not support buffer access", driver.getClass().getName()));<a name="line.724"></a>
<span class="sourceLineNo">725</span>                }<a name="line.725"></a>
<span class="sourceLineNo">726</span>        }<a name="line.726"></a>
<span class="sourceLineNo">727</span><a name="line.727"></a>
<span class="sourceLineNo">728</span>        /**<a name="line.728"></a>
<span class="sourceLineNo">729</span>         * Is webcam ready to be read.<a name="line.729"></a>
<span class="sourceLineNo">730</span>         *<a name="line.730"></a>
<span class="sourceLineNo">731</span>         * @return True if ready, false otherwise<a name="line.731"></a>
<span class="sourceLineNo">732</span>         */<a name="line.732"></a>
<span class="sourceLineNo">733</span>        private boolean isReady() {<a name="line.733"></a>
<span class="sourceLineNo">734</span><a name="line.734"></a>
<span class="sourceLineNo">735</span>                assert disposed != null;<a name="line.735"></a>
<span class="sourceLineNo">736</span>                assert open != null;<a name="line.736"></a>
<span class="sourceLineNo">737</span><a name="line.737"></a>
<span class="sourceLineNo">738</span>                if (disposed.get()) {<a name="line.738"></a>
<span class="sourceLineNo">739</span>                        LOG.warn("Cannot get image, webcam has been already disposed");<a name="line.739"></a>
<span class="sourceLineNo">740</span>                        return false;<a name="line.740"></a>
<span class="sourceLineNo">741</span>                }<a name="line.741"></a>
<span class="sourceLineNo">742</span><a name="line.742"></a>
<span class="sourceLineNo">743</span>                if (!open.get()) {<a name="line.743"></a>
<span class="sourceLineNo">744</span>                        if (autoOpen) {<a name="line.744"></a>
<span class="sourceLineNo">745</span>                                open();<a name="line.745"></a>
<span class="sourceLineNo">746</span>                        } else {<a name="line.746"></a>
<span class="sourceLineNo">747</span>                                return false;<a name="line.747"></a>
<span class="sourceLineNo">748</span>                        }<a name="line.748"></a>
<span class="sourceLineNo">749</span>                }<a name="line.749"></a>
<span class="sourceLineNo">750</span><a name="line.750"></a>
<span class="sourceLineNo">751</span>                return true;<a name="line.751"></a>
<span class="sourceLineNo">752</span>        }<a name="line.752"></a>
<span class="sourceLineNo">753</span><a name="line.753"></a>
<span class="sourceLineNo">754</span>        /**<a name="line.754"></a>
<span class="sourceLineNo">755</span>         * Get list of webcams to use. This method will wait predefined time interval for webcam devices<a name="line.755"></a>
<span class="sourceLineNo">756</span>         * to be discovered. By default this time is set to 1 minute.<a name="line.756"></a>
<span class="sourceLineNo">757</span>         *<a name="line.757"></a>
<span class="sourceLineNo">758</span>         * @return List of webcams existing in the system<a name="line.758"></a>
<span class="sourceLineNo">759</span>         * @throws WebcamException when something is wrong<a name="line.759"></a>
<span class="sourceLineNo">760</span>         * @see Webcam#getWebcams(long, TimeUnit)<a name="line.760"></a>
<span class="sourceLineNo">761</span>         */<a name="line.761"></a>
<span class="sourceLineNo">762</span>        public static List&lt;Webcam&gt; getWebcams() throws WebcamException {<a name="line.762"></a>
<span class="sourceLineNo">763</span><a name="line.763"></a>
<span class="sourceLineNo">764</span>                // timeout exception below will never be caught since user would have to<a name="line.764"></a>
<span class="sourceLineNo">765</span>                // wait around three hundreds billion years for it to occur<a name="line.765"></a>
<span class="sourceLineNo">766</span><a name="line.766"></a>
<span class="sourceLineNo">767</span>                try {<a name="line.767"></a>
<span class="sourceLineNo">768</span>                        return getWebcams(Long.MAX_VALUE);<a name="line.768"></a>
<span class="sourceLineNo">769</span>                } catch (TimeoutException e) {<a name="line.769"></a>
<span class="sourceLineNo">770</span>                        throw new RuntimeException(e);<a name="line.770"></a>
<span class="sourceLineNo">771</span>                }<a name="line.771"></a>
<span class="sourceLineNo">772</span>        }<a name="line.772"></a>
<span class="sourceLineNo">773</span><a name="line.773"></a>
<span class="sourceLineNo">774</span>        /**<a name="line.774"></a>
<span class="sourceLineNo">775</span>         * Get list of webcams to use. This method will wait given time interval for webcam devices to<a name="line.775"></a>
<span class="sourceLineNo">776</span>         * be discovered. Time argument is given in milliseconds.<a name="line.776"></a>
<span class="sourceLineNo">777</span>         *<a name="line.777"></a>
<span class="sourceLineNo">778</span>         * @param timeout the time to wait for webcam devices to be discovered<a name="line.778"></a>
<span class="sourceLineNo">779</span>         * @return List of webcams existing in the ssytem<a name="line.779"></a>
<span class="sourceLineNo">780</span>         * @throws TimeoutException when timeout occurs<a name="line.780"></a>
<span class="sourceLineNo">781</span>         * @throws WebcamException when something is wrong<a name="line.781"></a>
<span class="sourceLineNo">782</span>         * @throws IllegalArgumentException when timeout is negative<a name="line.782"></a>
<span class="sourceLineNo">783</span>         * @see Webcam#getWebcams(long, TimeUnit)<a name="line.783"></a>
<span class="sourceLineNo">784</span>         */<a name="line.784"></a>
<span class="sourceLineNo">785</span>        public static List&lt;Webcam&gt; getWebcams(long timeout) throws TimeoutException, WebcamException {<a name="line.785"></a>
<span class="sourceLineNo">786</span>                if (timeout &lt; 0) {<a name="line.786"></a>
<span class="sourceLineNo">787</span>                        throw new IllegalArgumentException(String.format("Timeout cannot be negative (%d)", timeout));<a name="line.787"></a>
<span class="sourceLineNo">788</span>                }<a name="line.788"></a>
<span class="sourceLineNo">789</span>                return getWebcams(timeout, TimeUnit.MILLISECONDS);<a name="line.789"></a>
<span class="sourceLineNo">790</span>        }<a name="line.790"></a>
<span class="sourceLineNo">791</span><a name="line.791"></a>
<span class="sourceLineNo">792</span>        /**<a name="line.792"></a>
<span class="sourceLineNo">793</span>         * Get list of webcams to use. This method will wait given time interval for webcam devices to<a name="line.793"></a>
<span class="sourceLineNo">794</span>         * be discovered.<a name="line.794"></a>
<span class="sourceLineNo">795</span>         *<a name="line.795"></a>
<span class="sourceLineNo">796</span>         * @param timeout the devices discovery timeout<a name="line.796"></a>
<span class="sourceLineNo">797</span>         * @param tunit the time unit<a name="line.797"></a>
<span class="sourceLineNo">798</span>         * @return List of webcams<a name="line.798"></a>
<span class="sourceLineNo">799</span>         * @throws TimeoutException when timeout has been exceeded<a name="line.799"></a>
<span class="sourceLineNo">800</span>         * @throws WebcamException when something is wrong<a name="line.800"></a>
<span class="sourceLineNo">801</span>         * @throws IllegalArgumentException when timeout is negative or tunit null<a name="line.801"></a>
<span class="sourceLineNo">802</span>         */<a name="line.802"></a>
<span class="sourceLineNo">803</span>        public static synchronized List&lt;Webcam&gt; getWebcams(long timeout, TimeUnit tunit) throws TimeoutException, WebcamException {<a name="line.803"></a>
<span class="sourceLineNo">804</span><a name="line.804"></a>
<span class="sourceLineNo">805</span>                if (timeout &lt; 0) {<a name="line.805"></a>
<span class="sourceLineNo">806</span>                        throw new IllegalArgumentException(String.format("Timeout cannot be negative (%d)", timeout));<a name="line.806"></a>
<span class="sourceLineNo">807</span>                }<a name="line.807"></a>
<span class="sourceLineNo">808</span>                if (tunit == null) {<a name="line.808"></a>
<span class="sourceLineNo">809</span>                        throw new IllegalArgumentException("Time unit cannot be null!");<a name="line.809"></a>
<span class="sourceLineNo">810</span>                }<a name="line.810"></a>
<span class="sourceLineNo">811</span><a name="line.811"></a>
<span class="sourceLineNo">812</span>                WebcamDiscoveryService discovery = getDiscoveryService();<a name="line.812"></a>
<span class="sourceLineNo">813</span><a name="line.813"></a>
<span class="sourceLineNo">814</span>                assert discovery != null;<a name="line.814"></a>
<span class="sourceLineNo">815</span><a name="line.815"></a>
<span class="sourceLineNo">816</span>                List&lt;Webcam&gt; webcams = discovery.getWebcams(timeout, tunit);<a name="line.816"></a>
<span class="sourceLineNo">817</span>                if (!discovery.isRunning()) {<a name="line.817"></a>
<span class="sourceLineNo">818</span>                        discovery.start();<a name="line.818"></a>
<span class="sourceLineNo">819</span>                }<a name="line.819"></a>
<span class="sourceLineNo">820</span><a name="line.820"></a>
<span class="sourceLineNo">821</span>                return webcams;<a name="line.821"></a>
<span class="sourceLineNo">822</span>        }<a name="line.822"></a>
<span class="sourceLineNo">823</span><a name="line.823"></a>
<span class="sourceLineNo">824</span>        /**<a name="line.824"></a>
<span class="sourceLineNo">825</span>         * Will discover and return first webcam available in the system.<a name="line.825"></a>
<span class="sourceLineNo">826</span>         *<a name="line.826"></a>
<span class="sourceLineNo">827</span>         * @return Default webcam (first from the list)<a name="line.827"></a>
<span class="sourceLineNo">828</span>         * @throws WebcamException if something is really wrong<a name="line.828"></a>
<span class="sourceLineNo">829</span>         * @see Webcam#getWebcams()<a name="line.829"></a>
<span class="sourceLineNo">830</span>         */<a name="line.830"></a>
<span class="sourceLineNo">831</span>        public static Webcam getDefault() throws WebcamException {<a name="line.831"></a>
<span class="sourceLineNo">832</span><a name="line.832"></a>
<span class="sourceLineNo">833</span>                try {<a name="line.833"></a>
<span class="sourceLineNo">834</span>                        return getDefault(Long.MAX_VALUE);<a name="line.834"></a>
<span class="sourceLineNo">835</span>                } catch (TimeoutException e) {<a name="line.835"></a>
<span class="sourceLineNo">836</span>                        // this should never happen since user would have to wait 300000000<a name="line.836"></a>
<span class="sourceLineNo">837</span>                        // years for it to occur<a name="line.837"></a>
<span class="sourceLineNo">838</span>                        throw new RuntimeException(e);<a name="line.838"></a>
<span class="sourceLineNo">839</span>                }<a name="line.839"></a>
<span class="sourceLineNo">840</span>        }<a name="line.840"></a>
<span class="sourceLineNo">841</span><a name="line.841"></a>
<span class="sourceLineNo">842</span>        /**<a name="line.842"></a>
<span class="sourceLineNo">843</span>         * Will discover and return first webcam available in the system.<a name="line.843"></a>
<span class="sourceLineNo">844</span>         *<a name="line.844"></a>
<span class="sourceLineNo">845</span>         * @param timeout the webcam discovery timeout (1 minute by default)<a name="line.845"></a>
<span class="sourceLineNo">846</span>         * @return Default webcam (first from the list)<a name="line.846"></a>
<span class="sourceLineNo">847</span>         * @throws TimeoutException when discovery timeout has been exceeded<a name="line.847"></a>
<span class="sourceLineNo">848</span>         * @throws WebcamException if something is really wrong<a name="line.848"></a>
<span class="sourceLineNo">849</span>         * @throws IllegalArgumentException when timeout is negative<a name="line.849"></a>
<span class="sourceLineNo">850</span>         * @see Webcam#getWebcams(long)<a name="line.850"></a>
<span class="sourceLineNo">851</span>         */<a name="line.851"></a>
<span class="sourceLineNo">852</span>        public static Webcam getDefault(long timeout) throws TimeoutException, WebcamException {<a name="line.852"></a>
<span class="sourceLineNo">853</span>                if (timeout &lt; 0) {<a name="line.853"></a>
<span class="sourceLineNo">854</span>                        throw new IllegalArgumentException(String.format("Timeout cannot be negative (%d)", timeout));<a name="line.854"></a>
<span class="sourceLineNo">855</span>                }<a name="line.855"></a>
<span class="sourceLineNo">856</span>                return getDefault(timeout, TimeUnit.MILLISECONDS);<a name="line.856"></a>
<span class="sourceLineNo">857</span>        }<a name="line.857"></a>
<span class="sourceLineNo">858</span><a name="line.858"></a>
<span class="sourceLineNo">859</span>        /**<a name="line.859"></a>
<span class="sourceLineNo">860</span>         * Will discover and return first webcam available in the system.<a name="line.860"></a>
<span class="sourceLineNo">861</span>         *<a name="line.861"></a>
<span class="sourceLineNo">862</span>         * @param timeout the webcam discovery timeout (1 minute by default)<a name="line.862"></a>
<span class="sourceLineNo">863</span>         * @param tunit the time unit<a name="line.863"></a>
<span class="sourceLineNo">864</span>         * @return Default webcam (first from the list)<a name="line.864"></a>
<span class="sourceLineNo">865</span>         * @throws TimeoutException when discovery timeout has been exceeded<a name="line.865"></a>
<span class="sourceLineNo">866</span>         * @throws WebcamException if something is really wrong<a name="line.866"></a>
<span class="sourceLineNo">867</span>         * @throws IllegalArgumentException when timeout is negative or tunit null<a name="line.867"></a>
<span class="sourceLineNo">868</span>         * @see Webcam#getWebcams(long, TimeUnit)<a name="line.868"></a>
<span class="sourceLineNo">869</span>         */<a name="line.869"></a>
<span class="sourceLineNo">870</span>        public static Webcam getDefault(long timeout, TimeUnit tunit) throws TimeoutException, WebcamException {<a name="line.870"></a>
<span class="sourceLineNo">871</span><a name="line.871"></a>
<span class="sourceLineNo">872</span>                if (timeout &lt; 0) {<a name="line.872"></a>
<span class="sourceLineNo">873</span>                        throw new IllegalArgumentException(String.format("Timeout cannot be negative (%d)", timeout));<a name="line.873"></a>
<span class="sourceLineNo">874</span>                }<a name="line.874"></a>
<span class="sourceLineNo">875</span>                if (tunit == null) {<a name="line.875"></a>
<span class="sourceLineNo">876</span>                        throw new IllegalArgumentException("Time unit cannot be null!");<a name="line.876"></a>
<span class="sourceLineNo">877</span>                }<a name="line.877"></a>
<span class="sourceLineNo">878</span><a name="line.878"></a>
<span class="sourceLineNo">879</span>                List&lt;Webcam&gt; webcams = getWebcams(timeout, tunit);<a name="line.879"></a>
<span class="sourceLineNo">880</span><a name="line.880"></a>
<span class="sourceLineNo">881</span>                assert webcams != null;<a name="line.881"></a>
<span class="sourceLineNo">882</span><a name="line.882"></a>
<span class="sourceLineNo">883</span>                if (!webcams.isEmpty()) {<a name="line.883"></a>
<span class="sourceLineNo">884</span>                        return webcams.get(0);<a name="line.884"></a>
<span class="sourceLineNo">885</span>                }<a name="line.885"></a>
<span class="sourceLineNo">886</span><a name="line.886"></a>
<span class="sourceLineNo">887</span>                LOG.warn("No webcam has been detected!");<a name="line.887"></a>
<span class="sourceLineNo">888</span><a name="line.888"></a>
<span class="sourceLineNo">889</span>                return null;<a name="line.889"></a>
<span class="sourceLineNo">890</span>        }<a name="line.890"></a>
<span class="sourceLineNo">891</span><a name="line.891"></a>
<span class="sourceLineNo">892</span>        /**<a name="line.892"></a>
<span class="sourceLineNo">893</span>         * Get webcam name (device name). The name of device depends on the value returned by the<a name="line.893"></a>
<span class="sourceLineNo">894</span>         * underlying data source, so in some cases it can be human-readable value and sometimes it can<a name="line.894"></a>
<span class="sourceLineNo">895</span>         * be some strange number.<a name="line.895"></a>
<span class="sourceLineNo">896</span>         *<a name="line.896"></a>
<span class="sourceLineNo">897</span>         * @return Name<a name="line.897"></a>
<span class="sourceLineNo">898</span>         */<a name="line.898"></a>
<span class="sourceLineNo">899</span>        public String getName() {<a name="line.899"></a>
<span class="sourceLineNo">900</span>                assert device != null;<a name="line.900"></a>
<span class="sourceLineNo">901</span>                return device.getName();<a name="line.901"></a>
<span class="sourceLineNo">902</span>        }<a name="line.902"></a>
<span class="sourceLineNo">903</span><a name="line.903"></a>
<span class="sourceLineNo">904</span>        @Override<a name="line.904"></a>
<span class="sourceLineNo">905</span>        public String toString() {<a name="line.905"></a>
<span class="sourceLineNo">906</span>                return String.format("Webcam %s", getName());<a name="line.906"></a>
<span class="sourceLineNo">907</span>        }<a name="line.907"></a>
<span class="sourceLineNo">908</span><a name="line.908"></a>
<span class="sourceLineNo">909</span>        /**<a name="line.909"></a>
<span class="sourceLineNo">910</span>         * Add webcam listener.<a name="line.910"></a>
<span class="sourceLineNo">911</span>         *<a name="line.911"></a>
<span class="sourceLineNo">912</span>         * @param l the listener to be added<a name="line.912"></a>
<span class="sourceLineNo">913</span>         * @return True if listener has been added, false if it was already there<a name="line.913"></a>
<span class="sourceLineNo">914</span>         * @throws IllegalArgumentException when argument is null<a name="line.914"></a>
<span class="sourceLineNo">915</span>         */<a name="line.915"></a>
<span class="sourceLineNo">916</span>        public boolean addWebcamListener(WebcamListener l) {<a name="line.916"></a>
<span class="sourceLineNo">917</span>                if (l == null) {<a name="line.917"></a>
<span class="sourceLineNo">918</span>                        throw new IllegalArgumentException("Webcam listener cannot be null!");<a name="line.918"></a>
<span class="sourceLineNo">919</span>                }<a name="line.919"></a>
<span class="sourceLineNo">920</span>                assert listeners != null;<a name="line.920"></a>
<span class="sourceLineNo">921</span>                return listeners.add(l);<a name="line.921"></a>
<span class="sourceLineNo">922</span>        }<a name="line.922"></a>
<span class="sourceLineNo">923</span><a name="line.923"></a>
<span class="sourceLineNo">924</span>        /**<a name="line.924"></a>
<span class="sourceLineNo">925</span>         * @return All webcam listeners<a name="line.925"></a>
<span class="sourceLineNo">926</span>         */<a name="line.926"></a>
<span class="sourceLineNo">927</span>        public WebcamListener[] getWebcamListeners() {<a name="line.927"></a>
<span class="sourceLineNo">928</span>                assert listeners != null;<a name="line.928"></a>
<span class="sourceLineNo">929</span>                return listeners.toArray(new WebcamListener[listeners.size()]);<a name="line.929"></a>
<span class="sourceLineNo">930</span>        }<a name="line.930"></a>
<span class="sourceLineNo">931</span><a name="line.931"></a>
<span class="sourceLineNo">932</span>        /**<a name="line.932"></a>
<span class="sourceLineNo">933</span>         * @return Number of webcam listeners<a name="line.933"></a>
<span class="sourceLineNo">934</span>         */<a name="line.934"></a>
<span class="sourceLineNo">935</span>        public int getWebcamListenersCount() {<a name="line.935"></a>
<span class="sourceLineNo">936</span>                assert listeners != null;<a name="line.936"></a>
<span class="sourceLineNo">937</span>                return listeners.size();<a name="line.937"></a>
<span class="sourceLineNo">938</span>        }<a name="line.938"></a>
<span class="sourceLineNo">939</span><a name="line.939"></a>
<span class="sourceLineNo">940</span>        /**<a name="line.940"></a>
<span class="sourceLineNo">941</span>         * Removes webcam listener.<a name="line.941"></a>
<span class="sourceLineNo">942</span>         *<a name="line.942"></a>
<span class="sourceLineNo">943</span>         * @param l the listener to be removed<a name="line.943"></a>
<span class="sourceLineNo">944</span>         * @return True if listener has been removed, false otherwise<a name="line.944"></a>
<span class="sourceLineNo">945</span>         */<a name="line.945"></a>
<span class="sourceLineNo">946</span>        public boolean removeWebcamListener(WebcamListener l) {<a name="line.946"></a>
<span class="sourceLineNo">947</span>                assert listeners != null;<a name="line.947"></a>
<span class="sourceLineNo">948</span>                return listeners.remove(l);<a name="line.948"></a>
<span class="sourceLineNo">949</span>        }<a name="line.949"></a>
<span class="sourceLineNo">950</span><a name="line.950"></a>
<span class="sourceLineNo">951</span>        /**<a name="line.951"></a>
<span class="sourceLineNo">952</span>         * Return webcam driver. Perform search if necessary.&lt;br&gt;<a name="line.952"></a>
<span class="sourceLineNo">953</span>         * &lt;br&gt;<a name="line.953"></a>
<span class="sourceLineNo">954</span>         * &lt;b&gt;This method is not thread-safe!&lt;/b&gt;<a name="line.954"></a>
<span class="sourceLineNo">955</span>         *<a name="line.955"></a>
<span class="sourceLineNo">956</span>         * @return Webcam driver<a name="line.956"></a>
<span class="sourceLineNo">957</span>         */<a name="line.957"></a>
<span class="sourceLineNo">958</span>        public static synchronized WebcamDriver getDriver() {<a name="line.958"></a>
<span class="sourceLineNo">959</span><a name="line.959"></a>
<span class="sourceLineNo">960</span>                if (driver != null) {<a name="line.960"></a>
<span class="sourceLineNo">961</span>                        return driver;<a name="line.961"></a>
<span class="sourceLineNo">962</span>                }<a name="line.962"></a>
<span class="sourceLineNo">963</span><a name="line.963"></a>
<span class="sourceLineNo">964</span>                if (driver == null) {<a name="line.964"></a>
<span class="sourceLineNo">965</span>                        driver = WebcamDriverUtils.findDriver(DRIVERS_LIST, DRIVERS_CLASS_LIST);<a name="line.965"></a>
<span class="sourceLineNo">966</span>                }<a name="line.966"></a>
<span class="sourceLineNo">967</span>                if (driver == null) {<a name="line.967"></a>
<span class="sourceLineNo">968</span>                        driver = new WebcamDefaultDriver();<a name="line.968"></a>
<span class="sourceLineNo">969</span>                }<a name="line.969"></a>
<span class="sourceLineNo">970</span><a name="line.970"></a>
<span class="sourceLineNo">971</span>                LOG.info("{} capture driver will be used", driver.getClass().getSimpleName());<a name="line.971"></a>
<span class="sourceLineNo">972</span><a name="line.972"></a>
<span class="sourceLineNo">973</span>                return driver;<a name="line.973"></a>
<span class="sourceLineNo">974</span>        }<a name="line.974"></a>
<span class="sourceLineNo">975</span><a name="line.975"></a>
<span class="sourceLineNo">976</span>        /**<a name="line.976"></a>
<span class="sourceLineNo">977</span>         * Set new video driver to be used by webcam.&lt;br&gt;<a name="line.977"></a>
<span class="sourceLineNo">978</span>         * &lt;br&gt;<a name="line.978"></a>
<span class="sourceLineNo">979</span>         * &lt;b&gt;This method is not thread-safe!&lt;/b&gt;<a name="line.979"></a>
<span class="sourceLineNo">980</span>         *<a name="line.980"></a>
<span class="sourceLineNo">981</span>         * @param wd new webcam driver to be used (e.g. LtiCivil, JFM, FMJ, QTJ)<a name="line.981"></a>
<span class="sourceLineNo">982</span>         * @throws IllegalArgumentException when argument is null<a name="line.982"></a>
<span class="sourceLineNo">983</span>         */<a name="line.983"></a>
<span class="sourceLineNo">984</span>        public static void setDriver(WebcamDriver wd) {<a name="line.984"></a>
<span class="sourceLineNo">985</span><a name="line.985"></a>
<span class="sourceLineNo">986</span>                if (wd == null) {<a name="line.986"></a>
<span class="sourceLineNo">987</span>                        throw new IllegalArgumentException("Webcam driver cannot be null!");<a name="line.987"></a>
<span class="sourceLineNo">988</span>                }<a name="line.988"></a>
<span class="sourceLineNo">989</span><a name="line.989"></a>
<span class="sourceLineNo">990</span>                LOG.debug("Setting new capture driver {}", wd);<a name="line.990"></a>
<span class="sourceLineNo">991</span><a name="line.991"></a>
<span class="sourceLineNo">992</span>                resetDriver();<a name="line.992"></a>
<span class="sourceLineNo">993</span><a name="line.993"></a>
<span class="sourceLineNo">994</span>                driver = wd;<a name="line.994"></a>
<span class="sourceLineNo">995</span>        }<a name="line.995"></a>
<span class="sourceLineNo">996</span><a name="line.996"></a>
<span class="sourceLineNo">997</span>        /**<a name="line.997"></a>
<span class="sourceLineNo">998</span>         * Set new video driver class to be used by webcam. Class given in the argument shall extend<a name="line.998"></a>
<span class="sourceLineNo">999</span>         * {@link WebcamDriver} interface and should have public default constructor, so instance can be<a name="line.999"></a>
<span class="sourceLineNo">1000</span>         * created by reflection.&lt;br&gt;<a name="line.1000"></a>
<span class="sourceLineNo">1001</span>         * &lt;br&gt;<a name="line.1001"></a>
<span class="sourceLineNo">1002</span>         * &lt;b&gt;This method is not thread-safe!&lt;/b&gt;<a name="line.1002"></a>
<span class="sourceLineNo">1003</span>         *<a name="line.1003"></a>
<span class="sourceLineNo">1004</span>         * @param driverClass new video driver class to use<a name="line.1004"></a>
<span class="sourceLineNo">1005</span>         * @throws IllegalArgumentException when argument is null<a name="line.1005"></a>
<span class="sourceLineNo">1006</span>         */<a name="line.1006"></a>
<span class="sourceLineNo">1007</span>        public static void setDriver(Class&lt;? extends WebcamDriver&gt; driverClass) {<a name="line.1007"></a>
<span class="sourceLineNo">1008</span><a name="line.1008"></a>
<span class="sourceLineNo">1009</span>                if (driverClass == null) {<a name="line.1009"></a>
<span class="sourceLineNo">1010</span>                        throw new IllegalArgumentException("Webcam driver class cannot be null!");<a name="line.1010"></a>
<span class="sourceLineNo">1011</span>                }<a name="line.1011"></a>
<span class="sourceLineNo">1012</span><a name="line.1012"></a>
<span class="sourceLineNo">1013</span>                resetDriver();<a name="line.1013"></a>
<span class="sourceLineNo">1014</span><a name="line.1014"></a>
<span class="sourceLineNo">1015</span>                try {<a name="line.1015"></a>
<span class="sourceLineNo">1016</span>                        driver = driverClass.newInstance();<a name="line.1016"></a>
<span class="sourceLineNo">1017</span>                } catch (InstantiationException e) {<a name="line.1017"></a>
<span class="sourceLineNo">1018</span>                        throw new WebcamException(e);<a name="line.1018"></a>
<span class="sourceLineNo">1019</span>                } catch (IllegalAccessException e) {<a name="line.1019"></a>
<span class="sourceLineNo">1020</span>                        throw new WebcamException(e);<a name="line.1020"></a>
<span class="sourceLineNo">1021</span>                }<a name="line.1021"></a>
<span class="sourceLineNo">1022</span>        }<a name="line.1022"></a>
<span class="sourceLineNo">1023</span><a name="line.1023"></a>
<span class="sourceLineNo">1024</span>        /**<a name="line.1024"></a>
<span class="sourceLineNo">1025</span>         * Reset webcam driver.&lt;br&gt;<a name="line.1025"></a>
<span class="sourceLineNo">1026</span>         * &lt;br&gt;<a name="line.1026"></a>
<span class="sourceLineNo">1027</span>         * &lt;b&gt;This method is not thread-safe!&lt;/b&gt;<a name="line.1027"></a>
<span class="sourceLineNo">1028</span>         */<a name="line.1028"></a>
<span class="sourceLineNo">1029</span>        public static void resetDriver() {<a name="line.1029"></a>
<span class="sourceLineNo">1030</span><a name="line.1030"></a>
<span class="sourceLineNo">1031</span>                synchronized (DRIVERS_LIST) {<a name="line.1031"></a>
<span class="sourceLineNo">1032</span>                        DRIVERS_LIST.clear();<a name="line.1032"></a>
<span class="sourceLineNo">1033</span>                }<a name="line.1033"></a>
<span class="sourceLineNo">1034</span><a name="line.1034"></a>
<span class="sourceLineNo">1035</span>                if (discovery != null) {<a name="line.1035"></a>
<span class="sourceLineNo">1036</span>                        discovery.shutdown();<a name="line.1036"></a>
<span class="sourceLineNo">1037</span>                        discovery = null;<a name="line.1037"></a>
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<span class="sourceLineNo">1039</span><a name="line.1039"></a>
<span class="sourceLineNo">1040</span>                driver = null;<a name="line.1040"></a>
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<span class="sourceLineNo">1042</span><a name="line.1042"></a>
<span class="sourceLineNo">1043</span>        /**<a name="line.1043"></a>
<span class="sourceLineNo">1044</span>         * Register new webcam video driver.<a name="line.1044"></a>
<span class="sourceLineNo">1045</span>         *<a name="line.1045"></a>
<span class="sourceLineNo">1046</span>         * @param clazz webcam video driver class<a name="line.1046"></a>
<span class="sourceLineNo">1047</span>         * @throws IllegalArgumentException when argument is null<a name="line.1047"></a>
<span class="sourceLineNo">1048</span>         */<a name="line.1048"></a>
<span class="sourceLineNo">1049</span>        public static void registerDriver(Class&lt;? extends WebcamDriver&gt; clazz) {<a name="line.1049"></a>
<span class="sourceLineNo">1050</span>                if (clazz == null) {<a name="line.1050"></a>
<span class="sourceLineNo">1051</span>                        throw new IllegalArgumentException("Webcam driver class to register cannot be null!");<a name="line.1051"></a>
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<span class="sourceLineNo">1053</span>                DRIVERS_CLASS_LIST.add(clazz);<a name="line.1053"></a>
<span class="sourceLineNo">1054</span>                registerDriver(clazz.getCanonicalName());<a name="line.1054"></a>
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<span class="sourceLineNo">1056</span><a name="line.1056"></a>
<span class="sourceLineNo">1057</span>        /**<a name="line.1057"></a>
<span class="sourceLineNo">1058</span>         * Register new webcam video driver.<a name="line.1058"></a>
<span class="sourceLineNo">1059</span>         *<a name="line.1059"></a>
<span class="sourceLineNo">1060</span>         * @param clazzName webcam video driver class name<a name="line.1060"></a>
<span class="sourceLineNo">1061</span>         * @throws IllegalArgumentException when argument is null<a name="line.1061"></a>
<span class="sourceLineNo">1062</span>         */<a name="line.1062"></a>
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<span class="sourceLineNo">1064</span>                if (clazzName == null) {<a name="line.1064"></a>
<span class="sourceLineNo">1065</span>                        throw new IllegalArgumentException("Webcam driver class name to register cannot be null!");<a name="line.1065"></a>
<span class="sourceLineNo">1066</span>                }<a name="line.1066"></a>
<span class="sourceLineNo">1067</span>                DRIVERS_LIST.add(clazzName);<a name="line.1067"></a>
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<span class="sourceLineNo">1069</span><a name="line.1069"></a>
<span class="sourceLineNo">1070</span>        /**<a name="line.1070"></a>
<span class="sourceLineNo">1071</span>         * &lt;b&gt;CAUTION!!!&lt;/b&gt;&lt;br&gt;<a name="line.1071"></a>
<span class="sourceLineNo">1072</span>         * &lt;br&gt;<a name="line.1072"></a>
<span class="sourceLineNo">1073</span>         * This is experimental feature to be used mostly in in development phase. After you set handle<a name="line.1073"></a>
<span class="sourceLineNo">1074</span>         * term signal to true, and fetch capture devices, Webcam Capture API will listen for TERM<a name="line.1074"></a>
<span class="sourceLineNo">1075</span>         * signal and try to close all devices after it has been received. &lt;b&gt;This feature can be<a name="line.1075"></a>
<span class="sourceLineNo">1076</span>         * unstable on some systems!&lt;/b&gt;<a name="line.1076"></a>
<span class="sourceLineNo">1077</span>         *<a name="line.1077"></a>
<span class="sourceLineNo">1078</span>         * @param on signal handling will be enabled if true, disabled otherwise<a name="line.1078"></a>
<span class="sourceLineNo">1079</span>         */<a name="line.1079"></a>
<span class="sourceLineNo">1080</span>        public static void setHandleTermSignal(boolean on) {<a name="line.1080"></a>
<span class="sourceLineNo">1081</span>                if (on) {<a name="line.1081"></a>
<span class="sourceLineNo">1082</span>                        LOG.warn("Automated deallocation on TERM signal is now enabled! Make sure to not use it in production!");<a name="line.1082"></a>
<span class="sourceLineNo">1083</span>                }<a name="line.1083"></a>
<span class="sourceLineNo">1084</span>                deallocOnTermSignal = on;<a name="line.1084"></a>
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<span class="sourceLineNo">1086</span><a name="line.1086"></a>
<span class="sourceLineNo">1087</span>        /**<a name="line.1087"></a>
<span class="sourceLineNo">1088</span>         * Is TERM signal handler enabled.<a name="line.1088"></a>
<span class="sourceLineNo">1089</span>         *<a name="line.1089"></a>
<span class="sourceLineNo">1090</span>         * @return True if enabled, false otherwise<a name="line.1090"></a>
<span class="sourceLineNo">1091</span>         */<a name="line.1091"></a>
<span class="sourceLineNo">1092</span>        public static boolean isHandleTermSignal() {<a name="line.1092"></a>
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<span class="sourceLineNo">1096</span>        /**<a name="line.1096"></a>
<span class="sourceLineNo">1097</span>         * Switch all webcams to auto open mode. In this mode, each webcam will be automatically open<a name="line.1097"></a>
<span class="sourceLineNo">1098</span>         * whenever user will try to get image from instance which has not yet been open. Please be<a name="line.1098"></a>
<span class="sourceLineNo">1099</span>         * aware of some side effects! In case of multi-threaded applications, there is no guarantee<a name="line.1099"></a>
<span class="sourceLineNo">1100</span>         * that one thread will not try to open webcam even if it was manually closed in different<a name="line.1100"></a>
<span class="sourceLineNo">1101</span>         * thread.<a name="line.1101"></a>
<span class="sourceLineNo">1102</span>         *<a name="line.1102"></a>
<span class="sourceLineNo">1103</span>         * @param on true to enable, false to disable<a name="line.1103"></a>
<span class="sourceLineNo">1104</span>         */<a name="line.1104"></a>
<span class="sourceLineNo">1105</span>        public static void setAutoOpenMode(boolean on) {<a name="line.1105"></a>
<span class="sourceLineNo">1106</span>                autoOpen = on;<a name="line.1106"></a>
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<span class="sourceLineNo">1108</span><a name="line.1108"></a>
<span class="sourceLineNo">1109</span>        /**<a name="line.1109"></a>
<span class="sourceLineNo">1110</span>         * Is auto open mode enabled. Auto open mode will will automatically open webcam whenever user<a name="line.1110"></a>
<span class="sourceLineNo">1111</span>         * will try to get image from instance which has not yet been open. Please be aware of some side<a name="line.1111"></a>
<span class="sourceLineNo">1112</span>         * effects! In case of multi-threaded applications, there is no guarantee that one thread will<a name="line.1112"></a>
<span class="sourceLineNo">1113</span>         * not try to open webcam even if it was manually closed in different thread.<a name="line.1113"></a>
<span class="sourceLineNo">1114</span>         *<a name="line.1114"></a>
<span class="sourceLineNo">1115</span>         * @return True if mode is enabled, false otherwise<a name="line.1115"></a>
<span class="sourceLineNo">1116</span>         */<a name="line.1116"></a>
<span class="sourceLineNo">1117</span>        public static boolean isAutoOpenMode() {<a name="line.1117"></a>
<span class="sourceLineNo">1118</span>                return autoOpen;<a name="line.1118"></a>
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<span class="sourceLineNo">1121</span>        /**<a name="line.1121"></a>
<span class="sourceLineNo">1122</span>         * Add new webcam discovery listener.<a name="line.1122"></a>
<span class="sourceLineNo">1123</span>         *<a name="line.1123"></a>
<span class="sourceLineNo">1124</span>         * @param l the listener to be added<a name="line.1124"></a>
<span class="sourceLineNo">1125</span>         * @return True, if listeners list size has been changed, false otherwise<a name="line.1125"></a>
<span class="sourceLineNo">1126</span>         * @throws IllegalArgumentException when argument is null<a name="line.1126"></a>
<span class="sourceLineNo">1127</span>         */<a name="line.1127"></a>
<span class="sourceLineNo">1128</span>        public static boolean addDiscoveryListener(WebcamDiscoveryListener l) {<a name="line.1128"></a>
<span class="sourceLineNo">1129</span>                if (l == null) {<a name="line.1129"></a>
<span class="sourceLineNo">1130</span>                        throw new IllegalArgumentException("Webcam discovery listener cannot be null!");<a name="line.1130"></a>
<span class="sourceLineNo">1131</span>                }<a name="line.1131"></a>
<span class="sourceLineNo">1132</span>                return DISCOVERY_LISTENERS.add(l);<a name="line.1132"></a>
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<span class="sourceLineNo">1134</span><a name="line.1134"></a>
<span class="sourceLineNo">1135</span>        public static WebcamDiscoveryListener[] getDiscoveryListeners() {<a name="line.1135"></a>
<span class="sourceLineNo">1136</span>                return DISCOVERY_LISTENERS.toArray(new WebcamDiscoveryListener[DISCOVERY_LISTENERS.size()]);<a name="line.1136"></a>
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<span class="sourceLineNo">1138</span><a name="line.1138"></a>
<span class="sourceLineNo">1139</span>        /**<a name="line.1139"></a>
<span class="sourceLineNo">1140</span>         * Remove discovery listener<a name="line.1140"></a>
<span class="sourceLineNo">1141</span>         *<a name="line.1141"></a>
<span class="sourceLineNo">1142</span>         * @param l the listener to be removed<a name="line.1142"></a>
<span class="sourceLineNo">1143</span>         * @return True if listeners list contained the specified element<a name="line.1143"></a>
<span class="sourceLineNo">1144</span>         */<a name="line.1144"></a>
<span class="sourceLineNo">1145</span>        public static boolean removeDiscoveryListener(WebcamDiscoveryListener l) {<a name="line.1145"></a>
<span class="sourceLineNo">1146</span>                return DISCOVERY_LISTENERS.remove(l);<a name="line.1146"></a>
<span class="sourceLineNo">1147</span>        }<a name="line.1147"></a>
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<span class="sourceLineNo">1149</span>        /**<a name="line.1149"></a>
<span class="sourceLineNo">1150</span>         * Return discovery service.<a name="line.1150"></a>
<span class="sourceLineNo">1151</span>         *<a name="line.1151"></a>
<span class="sourceLineNo">1152</span>         * @return Discovery service<a name="line.1152"></a>
<span class="sourceLineNo">1153</span>         */<a name="line.1153"></a>
<span class="sourceLineNo">1154</span>        public static synchronized WebcamDiscoveryService getDiscoveryService() {<a name="line.1154"></a>
<span class="sourceLineNo">1155</span>                if (discovery == null) {<a name="line.1155"></a>
<span class="sourceLineNo">1156</span>                        discovery = new WebcamDiscoveryService(getDriver());<a name="line.1156"></a>
<span class="sourceLineNo">1157</span>                }<a name="line.1157"></a>
<span class="sourceLineNo">1158</span>                return discovery;<a name="line.1158"></a>
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<span class="sourceLineNo">1160</span><a name="line.1160"></a>
<span class="sourceLineNo">1161</span>        /**<a name="line.1161"></a>
<span class="sourceLineNo">1162</span>         * Return discovery service without creating it if not exists.<a name="line.1162"></a>
<span class="sourceLineNo">1163</span>         *<a name="line.1163"></a>
<span class="sourceLineNo">1164</span>         * @return Discovery service or null if not yet created<a name="line.1164"></a>
<span class="sourceLineNo">1165</span>         */<a name="line.1165"></a>
<span class="sourceLineNo">1166</span>        public static synchronized WebcamDiscoveryService getDiscoveryServiceRef() {<a name="line.1166"></a>
<span class="sourceLineNo">1167</span>                return discovery;<a name="line.1167"></a>
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<span class="sourceLineNo">1169</span><a name="line.1169"></a>
<span class="sourceLineNo">1170</span>        /**<a name="line.1170"></a>
<span class="sourceLineNo">1171</span>         * Return image transformer.<a name="line.1171"></a>
<span class="sourceLineNo">1172</span>         *<a name="line.1172"></a>
<span class="sourceLineNo">1173</span>         * @return Transformer instance<a name="line.1173"></a>
<span class="sourceLineNo">1174</span>         */<a name="line.1174"></a>
<span class="sourceLineNo">1175</span>        public WebcamImageTransformer getImageTransformer() {<a name="line.1175"></a>
<span class="sourceLineNo">1176</span>                return transformer;<a name="line.1176"></a>
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<span class="sourceLineNo">1178</span><a name="line.1178"></a>
<span class="sourceLineNo">1179</span>        /**<a name="line.1179"></a>
<span class="sourceLineNo">1180</span>         * Set image transformer.<a name="line.1180"></a>
<span class="sourceLineNo">1181</span>         *<a name="line.1181"></a>
<span class="sourceLineNo">1182</span>         * @param transformer the transformer to be set<a name="line.1182"></a>
<span class="sourceLineNo">1183</span>         */<a name="line.1183"></a>
<span class="sourceLineNo">1184</span>        public void setImageTransformer(WebcamImageTransformer transformer) {<a name="line.1184"></a>
<span class="sourceLineNo">1185</span>                this.transformer = transformer;<a name="line.1185"></a>
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<span class="sourceLineNo">1187</span><a name="line.1187"></a>
<span class="sourceLineNo">1188</span>        /**<a name="line.1188"></a>
<span class="sourceLineNo">1189</span>         * Return webcam lock.<a name="line.1189"></a>
<span class="sourceLineNo">1190</span>         *<a name="line.1190"></a>
<span class="sourceLineNo">1191</span>         * @return Webcam lock<a name="line.1191"></a>
<span class="sourceLineNo">1192</span>         */<a name="line.1192"></a>
<span class="sourceLineNo">1193</span>        public WebcamLock getLock() {<a name="line.1193"></a>
<span class="sourceLineNo">1194</span>                return lock;<a name="line.1194"></a>
<span class="sourceLineNo">1195</span>        }<a name="line.1195"></a>
<span class="sourceLineNo">1196</span><a name="line.1196"></a>
<span class="sourceLineNo">1197</span>        public static void shutdown() {<a name="line.1197"></a>
<span class="sourceLineNo">1198</span><a name="line.1198"></a>
<span class="sourceLineNo">1199</span>                // stop discovery service<a name="line.1199"></a>
<span class="sourceLineNo">1200</span>                WebcamDiscoveryService discovery = getDiscoveryServiceRef();<a name="line.1200"></a>
<span class="sourceLineNo">1201</span>                if (discovery != null) {<a name="line.1201"></a>
<span class="sourceLineNo">1202</span>                        discovery.stop();<a name="line.1202"></a>
<span class="sourceLineNo">1203</span>                }<a name="line.1203"></a>
<span class="sourceLineNo">1204</span><a name="line.1204"></a>
<span class="sourceLineNo">1205</span>                // stop processor<a name="line.1205"></a>
<span class="sourceLineNo">1206</span>                WebcamProcessor.getInstance().shutdown();<a name="line.1206"></a>
<span class="sourceLineNo">1207</span>        }<a name="line.1207"></a>
<span class="sourceLineNo">1208</span>}<a name="line.1208"></a>




























































</pre>
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